Answer:
To make a sample of cobalt chloride crystals from cobalt oxide and dilute hydrochloric acid, follow the steps below:
Add cobalt oxide to dilute hydrochloric acid in a beaker or flask. Stir the mixture to ensure the cobalt oxide is well distributed in the acid.
Heat the mixture gently, stirring constantly, until all of the cobalt oxide has dissolved in the acid.
Filter the solution to remove any impurities.
Slowly add hot distilled water to the solution, stirring continuously, until the solution is saturated (i.e., no more cobalt chloride can dissolve in the solution).
Set the solution aside to cool. As the solution cools, cobalt chloride crystals will begin to form.
Once the solution has cooled completely, remove the cobalt chloride crystals from the solution using a filter or other method.
Rinse the crystals with distilled water to remove any remaining impurities.
Dry the cobalt chloride crystals thoroughly by placing them on a paper towel or in an oven at low temperature.
Explanation:
What was unknown to scientists during Wegener’s time?(1 point)
When Wegener was working, scientists were not aware of plate tectonics, the theory that explains how continents can shift.
The scientific community was not aware of the mechanism underlying the migration of the continents during the time of Wegener. Both the ideas of a solid Earth and plate tectonics had not yet gained widespread acceptance. Initially, scientists were sceptical of Wegener's idea of continental drift because they thought the Earth's surface was permanent and unchanging. The theory's development was hampered by the inability to collect and analyse data on a worldwide scale due to a lack of technology. The scientific world didn't completely embrace the idea of plate tectonics and the part it plays in sculpting the Earth's surface until decades later, with technological breakthroughs and the collection of more evidence.
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Can someone please help with this chemistry question?
If you have 3.45 mol sample of iron, how many grams of Fe₂O₃ will there be after the iron has rusted completely is 193.2 g Fe₂O₃.
Rust is a multi-paradigm, general-purpose programming language developed by Mozilla Research. It is designed to be a safe, concurrent, practical language that supports functional and procedural programming. Rust is syntactically similar to C++, but its memory safety features make it safer and more secure. It also provides better performance than many other languages. Rust provides memory safety by using a type system and a borrowing system to ensure that memory is only accessed when it is valid.
The balanced equation for the rusting of iron is:
Fe + O₂ -> Fe₂O₃
To calculate the grams of Fe2O₃ produced, we must first convert 3.45 mol Fe to grams.
Molar mass of Fe = 56.0 g/mol
Therefore, 3.45 mol Fe x 56.0 g/mol = 193.2 g Fe
Now, according to the balanced equation, 1 mol Fe produces 1 mol Fe₂O₃.
So, 193.2 g Fe will produce 193.2 g Fe₂O₃.
Therefore, the answer is 193.2 g Fe₂O₃.
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Please help me!! Enthalpy change: 20 points!! Please write it out
H-H: 432 kJ/mol,C-H: 413 kJ/mol,∆H = -451 kJ/mol.The rection is H-H + C-H => H + H + H- Therefore,this reaction is exothermic since the enthalpy change is negative.
What is enthalpy ?Enthalpy is a thermodynamic property that is a measure of the total energy content. It is the sum of the internal energy and the product of its pressure and volume. It is expressed in units of energy per unit mass, such as joules per kilogram (J/kg) or kilocalories per kilogram (kcal/kg).It is an important factor in the study of thermodynamics.
For reactants, two hydrogen molecules must be broken down into two hydrogen atoms (H-H bond energy = 432 kJ/mol).For products, one molecule of carbon monoxide must be formed from one carbon and oxygen atom (C-O bond energy = 799 kJ/mol). Therefore, the enthalpy change for this reaction is calculated as follows:ΔH = (799 kJ/mol) - (2 x 432 kJ/mol) = -5 kJ/mol.
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[see photo] please help!!
option a is the answer
10
Draw resonance structures to show in which position nitrobenzene will nitrate to form dinitrobenzene
In order to create 2,4-dinitrobenzene and 2,6-dinitrobenzene, respectively, nitrobenzene can be nitrated in either the ortho or para positions.
Draw resonance structures to show in which position nitrobenzene will nitrate to form dinitrobenzeneA nitro group (-NO2) is substituted for a hydrogen atom (-H) on the benzene ring during the nitration process. The nitrobenzene resonance structures demonstrate that the electrons are distributed between the nitro group and the benzene ring. Due to the partial negative charge they have as a result of the nitro group's electron-withdrawing effect, the ortho and para positions are more vulnerable to electrophilic attack as a result of this delocalization.
The following diagram depicts the resonance structures for the ortho and para nitration products:
Ortho nitrification
H H
| |
H---C---NO2 H---C---NO2
| |
H NO2
Para nitration:
H H
| |
H---C---NO2 NO2---C---H
| |
NO2 H
The nitro group is situated on the 2 and 4 positions of the benzene ring in the ortho nitration product, whereas it is situated on the 2 and 6 positions in the para nitration product.
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I don’t know what the answer are. Can some one please help.
The atomic radius, Pauling ionic radius, and first ionization energy of Bromine (Br), Chlorine (Cl), Magnesium (Mg), and Sodium (Na) are given in the attachment.
What is the atomic radius of an atom?A chemical element's atomic radius, which is typically the average or normal distance between the nucleus's center and the outermost isolated electron, serves as a gauge for the size of its atom.
Only by measuring the separation between the centers of two adjacent atoms and halving that distance can one determine the radius of an atom.
The ionic radius is the size of an ion.
The first ionization energy is the energy required to remove the first electron from an atom
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Partiendo de una mezcla gaseosa de H2 y N2 en la relacion de 3:1 a 450 C. Se encuentra que la mezcla tiene la sig composicion en volumen : 9. 6 NH3 22. 6 % NO2 67. 8 % H2. La presion total es de 50 atm. Calcular la Kp para la reaccion N2 (g) + H2 (g) =======> 2 NH3 (g)
Kp for the reaction [tex]N2(g) + 3H(g) + 2NH_3(g)[/tex] is 3.13 x 10⁻³
The gas ammonia (NH₃) is colourless and has a strong odour. Its molecular weight is 17.03 g/mol and it is composed of one nitrogen and three hydrogen atoms.
A balanced response is: [tex]3H2 + N2(g) = 2NH3 (g)[/tex]
The partial pressure of N₂ is x/4, the partial pressure of H₂ is 3x/4, the partial pressure of NH₃ is 0.6x, and the partial pressure of NO₂ is 0.226x. The total pressure is the sum of these partial pressures:
[tex]x/4 + 3x/4 + 0.6x + 0.226x = 50[/tex]
When we solve for x, we get x = 35.96 atm. Hence, we may calculate partial pressures:
PN₂ = 35.96/4 atm= 8.99 atm
PH₂ = 3(35.96)/4 atm= 26.98 atm
PNH₃ = 0.6(35.96) atm= 21.58 atm
PNO₂=0.226(35.96) atm= 8.12696 atm
Finally, we can calculate Kp using partial pressures:
Kp is equal to (PNH₃)₂ / (PN₂)(PH₂)₃ Kp is equal to (21.58)₂ / (8.99)(26.98)3 Kp is equal to 3.13 x 10⁻³
Hence, the Kp for the reaction [tex]N2(g) + 3H(g) 2NH_{3} (g)[/tex] is 3.13 x 10⁻³
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PLS HELP LOTS OF POINTS
If given the mass in grams of both reactants in a chemical reaction, how is the limiting reactant identified?
The reactant with the higher mass in grams is the limiting reactant.
Calculate the amount of product that can be made with each reactant, then choose the reactant that produces the least amount of product.
Calculate the amount of product that can be made with each reactant, then choose the reactant that produces the most amount of product.
The reactant with the lower mass in grams is the limiting reactant.
Answer:
Explanation:
The reactant with the higher mass in grams is the limiting reactant. NO. [What counts is the numbers of molecules, not their mass. For example In the reaction of oxygen and hydrogen to form water:
2H2 + O2 = 2H2O
We need twice as many H2 molecules than O2 molecules. We need two moles of H2 and 1 mole of O2 (or anything with that 2:1 ratio). But a mole of H2 only has a mass of 2 grams, so 2 moles is 4 grams. A balanced reaction in thias case would consist of 2 grams of H2 for every 32 grams of O2. If there were only 31 grams of O2, it would be the limiting reagent, despite the fact it's mass is still greater than that of H2O]
Calculate the amount of product that can be made with each reactant, then choose the reactant that produces the least amount of product. YES [Once the reactant is consumed in producing the least amount of product, no more product will be produced, desoppite the fact that the other reactant reamins.]
Calculate the amount of product that can be made with each reactant, then choose the reactant that produces the most amount of product. NO
[This ignores the fact that the reaction stops when the other reactant is depleted.]
The reactant with the lower mass in grams is the limiting reactant. NO, for the same reasons as in 1).
If water is added to 1 mole of sodium chloride in a flask until the solution is 1 liter what is the molarity of the solution? What is the molarity when water is added to 2 moles of sodium chloride to make 0. 5 liters?
Answer:
Explanation:
Molarity = moles /liters
M= 1/1 = 1M
B) 2moles/0.5 L = 4.0 M
State with reason whether or abond would be formed between two atoms of argon 18
The valence shell of Argon is completely filled, it is chemically stable, and it is not possible for it to gain or lose electrons to form chemical bonds with other Argon atoms.
Reason whether or a bond would be formed between two atoms of argon 18 is :
Two atoms of Argon (Ar) with atomic number 18 have completely filled outermost electron shells with 8 electrons in the valence shell (the highest energy level of electrons). The electronic configuration of Argon is 1s²2s²2p⁶3s²3p⁶, which means that the 3rd energy level (n=3) of Argon has 8 electrons in its valence shell.
Since the valence shell of Argon is completely filled, it is chemically stable, and it is not possible for it to gain or lose electrons to form chemical bonds with other Argon atoms. Therefore, two atoms of Argon cannot form a chemical bond with each other.
No, a bond will not be formed between two atoms of argon (Ar) 18. This is because Ar (18) is a noble gas, which means it has a full outer shell of electrons and does not need to form a bond in order to gain stability.
Hence, it can be concluded that no bond would be formed between two atoms of Argon (Ar).
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What is the mass % of H in Mn(C₂H₂O₂)4?
The percent mass of H is 3.3%. This can be found from the data of the elements that we have in the problem.
How do you find the percent mass of an element in a compound?To find the percent mass of an element in a compound, you need to follow these steps:
Determine the molar mass of the compound: This is the sum of the atomic masses of all the elements in the compound. You can find the atomic masses of elements on the periodic table.
Determine the molar mass of the element: This is the atomic mass of the element as it appears in the compound.
Calculate the moles of the element in the compound: This can be done using the formula: Moles = Mass of element / Molar mass of element.
Calculate the percent mass of the element in the compound: This can be done using the formula: Percent mass = (Moles of element x Molar mass of element / Molar mass of compound) x 100%.
Molar mass of the compound = 239 g/mol
Mass of H present = 8 (1) = 8
Percent of H = 8/239* 100/1
= 3.3%
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Balance the equation NH3 + O2 −→ N2 + H2O Given 3.53 mol of the reactant NH3, determine the corresponding amount of O2. Answer in units of mol.
A chemical equation is said to be balanced when the number of atoms of each element on both sides of the equation are the same.
According to this question, a reaction occured between ammonia gas and oxygen gas to produce nitrogen gas and water.
Based on the equation, 4 moles of ammonia requires 3 moles of oxygen gas to react.
This means that 3.53 moles of ammonia will require 3.53 × ¾ = 2.65 moles of oxygen gas.
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i need help for ideas for a presentation on electric charge
When put in an electric and magnetic field, a subatomic particle's electric charge causes it to feel force.
What is meant by electric charge?When put in an electromagnetic field, matter experiences a force due to its physical characteristic known as electric charge. You can have a positive or negative electric charge (commonly carried by protons and electrons respectively, by convention).
Unlike charges draw one another while like charges resist one another. Neutral refers to an item that carries no net energy. Classical electrodynamics, the name given to early understanding of how charged particles interact, is still correct for issues that do not call for taking into account quantum effects.
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Read the given chemical reaction.
C2H6 + O2 CO2 + H2O
How many moles of CO2 are produced during the complete combustion of 3. 6 moles of C2H6?
O 1. 8 moles
O 4. 4 molele
O 7. 2 moles
O 9. 2 moles
Answer:
So the correct answer is option (C) 7.2 moles.
Explanation:
According to the balanced chemical equation for the combustion of C2H6:
C2H6 + O2 → CO2 + H2O
The stoichiometric coefficients tell us that 1 mole of C2H6 reacts with 3 moles of O2 to produce 2 moles of CO2.
To determine how many moles of CO2 are produced from 3.6 moles of C2H6, we need to use stoichiometry. We can set up a proportion using the stoichiometric coefficients from the balanced equation:
3.6 mol C2H6 / 1 x 2 mol CO2 / 1 mol C2H6 = 7.2 mol CO2
Therefore, 7.2 moles of CO2 are produced during the complete combustion of 3.6 moles of C2H6.
So the correct answer is option (C) 7.2 moles.
in a hypothetical molecule, protons a and b are coupled to each other. proton a has a chemical shift of 6.02 ppm. what chemical shift for proton b will give the largest leaning effect for the signals of both protons?
Proton b's chemical shift, which will have the biggest leaning impact on both protons' impulses, is 10–14 Hz.
The leaning effect is determined by the magnitude of the coupling constant between protons a and b. The coupling constant is determined by the separation between the proton signals and the number of intervening bonds between them.
Protons that are separated by three bonds (i.e., are geminal) and have a coupling constant of 10-14 Hz produce the largest leaning effect In nuclear magnetic resonance (NMR), the largest leaning effect is caused by the geminal protons coupling, with a coupling constant of 10-14 Hz.
When the coupling constant between protons is greater, the peak splitting on the NMR spectrum increases. The chemical shift for proton b that will give the largest leaning effect for the signals of both protons is 10-14 Hz.
The two protons are geminal, which means they are separated by three bonds. Hence, the coupling constant of 10-14 Hz produces the largest leaning effect.
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Which factor is not likely to affect how quickly a person-to-person disease spreads through a group of people?
A. The color of the people's clothing. B. How much contact the people in the room have with each other. C. The contagiousness of the disease. D. Whether the people are wearing masks or not
The factor which is not likely to affect how quickly a person-to-person disease spreads through a group of people is The color of the people's clothing that is Option A.
Infectious diseases are illnesses caused by organisms like bacteria, viruses, fungus, or parasites. Numerous creatures inhabit and dwell on human body. They are usually innocuous or even beneficial. Yet, certain microbes can cause illness under particular conditions.
Certain infectious illnesses are transmissible from person to person. Some are spread by insects and other animals. You can get others by eating contaminated food or drinking polluted water, or by being exposed to organisms in the environment.
Infectious disorders are usually transmitted from person to person by the direct transmission of bacteria, viruses, or other germs. This can happen when an infected person touches, kisses, coughs, or sneezes on someone who isn't affected.
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Along the western coast of the United States is Death Valley, one of the hottest places in the world at the height of summertime. However just to the west is the Pacific Ocean. Death Valley runs from north to south between the Amargosa Range on the east and the Panamint Range on the west; the Sylvania Mountains and the Owlshead Mountains form its northern and southern boundaries, respectively. Using your knowledge of weather and climate and the image below, explain how a desert can form so close to an ocean.
The air is cooled by the currents, which causes it to rise and warm when it crosses land. This warming causes the air to hydrate, then afterward precipitates as the air passes deeper inland.
Can a desert and an ocean coexist?The impacts of grasslands hitting the sea are typically astounding. Namibia and or the Western Sahara constitute the place where the African desert meets north Mediterranean Sea. Moreover, the Sahara extends eastward to the Red Sea. The Atacama Desert and the Pacific Ocean meet strikingly in northern Chile.
Why do deserts surround chilly ocean currents?Cold ocean currents that move near the shore drive coastal deserts to emerge. The air is stabilised by the chilly winds, which also prevent cloud development. It produces a significant amount of fog. A dense blanket of minute water droplets which are too light to disperse as rain makes up a fog.
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Please answer these questions:
The RK of methyl orange is 3.5, as it changes color from red to yellow at a pH of 3, and has its most intense color (yellow) at pH 6.
What is methyl?Methyl is an organic compound with a formula of CH3, which is a single carbon atom bonded to three hydrogen atoms. It is a type of hydrocarbon and is the simplest of all alkyl compounds. Methyl is a versatile molecule that can be found in a variety of compounds, including pharmaceuticals, solvents, fragrances, and food additives. It is also used in the production of plastics, rubber, dyes, and other synthetic materials. Additionally, methyl is a key component of natural gas, oil, and coal, and can also be produced from biomass. In the body, methyl is used for a variety of biological processes, such as the metabolism of proteins, carbohydrates, and fats.
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A 150.0 gram sample of a white powder contains 61.05 g of carbon, 7.65 g of hydrogen, and 81.30 g of oxygen. What is the empirical formula of this compound?
Answer:
C2H3O2 (acetate)
Explanation:
61.05 g C x 1 mol C / 12.01 g C = 5.083 mol C
7.65 g H x 1 mol H / 1.01 g H = 7.57 mol H
81.30 g O x 1 mol O / 16.00 g O = 5.081 mol O
Divide by lowest number
5.083 / 5.081 = approx. 1 mol C
7.57 / 5.081 = approx. 1.5 mol H
5.081 / 5.081 = 1 mol O
so ratio of moles in this compound are 1 mol C : 1.5 mol H : 1 mol O
Multiply by 2 to get whole number mol ratios
--> empirical formula is C2H3O2 (acetate)
Look at the chemical equation below: 4Fe+3O₂----> ___ Fe₂O₃
The products in this equation are not balanced. How many molecules of Fe₂O₃ are needed to balance this equation?
Answer:
Explanation:
On the reactants side, we have:
4 iron
6 oxygen
On the products side, we have:
2 iron
3 oxygen.
This is now pretty easy, as it is clear that the reactants = 2×products
Thus, we need 2Fe₂O₃ to balance the equation
If 1.0 ton of carbon dioxide was dissolved in 1.0 x 106 gallons of ocean water, what would be the pH of this sample of ocean water? Assume this sample of ocean water does not significantly mix with nearby ocean water, and assume that other chemical components in the sea water that might counteract the effect of carbon dioxide, such as basic salts, can be ignored.
The equilibrium constant for the reaction of carbon dioxide with sea water is 1.2 x 10‐3. The acid dissociation constant (Ka) for H2CO3 is 4.3 x 10‐7. 1 ton = 2000 lbs
1 lb = 0.45 kg 1 gallon = 3.785 L
pH=
1 tonne of carbon dioxide has been dissolved in a sample of ocean water, which has a pH of 5.76.
The first step is to convert the given mass of carbon dioxide (1 ton) to moles. Since 1 ton = 2000 pounds, and 1 pound = 0.45 kilograms, 1 ton = 907.18 kilograms. To convert this to moles, we need to divide by the molar mass of [tex]CO_2[/tex], which is 44.01 g/mol.
Therefore, the number of moles of [tex]CO_2[/tex] in 1 ton is [tex]\frac{ 907.18}{44.01} = 20.59 moles.[/tex]
Next, we need to convert the given volume of ocean water (1.0x10 gallons) to liters. Since 1 gallon = 3.785 liters, the given volume is [tex]3.785*10^{10}[/tex] liters.
Thus, the number of moles of [tex]CO_2[/tex] per liter of ocean water is [tex]\frac{20.59}{3.785*10^{10}}= 5.45*10^{-10} moles/liter[/tex]
Now, we can calculate the pH of the sample.When carbon dioxide and sea water react, the equilibrium constant is ([tex]1.2*10^{-9}[/tex]) along with the acid dissociation constant (Ka.) for [tex]H_2CO[/tex] is ([tex]4.3*10^{-7}[/tex]). The pH of the sample can be calculated using the Henderson-Hasselbalch equation:
[tex]pH = pK_a + log(\frac{[base]}{[acid]})[/tex]
where [base] is the base's concentration ([tex]CO_2[/tex])and [acid] is the acid's concentration.([tex]H_2CO_3[/tex]). Since we already calculated the concentration of [tex]CO_2[/tex], We only have to determine the concentration of [tex]H_2CO_3[/tex],This is equivalent to the amount of [tex]CO_2[/tex] times the equilibrium constant:
[tex][H_2CO_3] = [CO_2] * K\\ = 5.45*10^{-10} moles/liter *1.2*10^{-9}\\ \\ = 6.54*10^{-19} moles/liter[/tex]
Now, we can plug all the values into the Henderson-Hasselbalch equation to calculate the pH:
[tex]pH = -log(4.3*10^{-7}) + log(\frac{5.45*10^{-10}}{6.54*10^{-19}})\\pH= 5.76[/tex]
Therefore, the pH of the sample of ocean water with 1 ton of carbon dioxide dissolved in it is 5.76.
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with added heated calcium carbonate decomposes to form calcium oxide and carbon dioxide. in which direction will the equilibrium shift if the temperature of the reaction is lowered? explain,
When the temperature of a reaction is lowered during the decomposition reaction of calcium carbonate to calcium oxide and carbon dioxide, the equilibrium will shift towards the reactants.
Exothermic reactions release heat energy into the surroundings, which means that the temperature of the reaction is lowered when it is proceeding from reactants to products. So, when the temperature is reduced, the system will try to increase the temperature by shifting the equilibrium towards the endothermic side, which means towards the reactants side.
Here, we know that decomposing heated calcium carbonate into calcium oxide, and carbon dioxide is an endothermic reaction because it requires heat. As a result, the equilibrium will shift towards the left (reactants side) to compensate for the decrease in temperature. This will increase the concentration of reactants and decrease the concentration of products, ultimately, it will cause the equilibrium to shift in the direction of reactants.
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With added heated calcium carbonate decomposes to form calcium oxide and carbon dioxide, the equilibrium will shift towards the reactant side if the temperature of the reaction is lowered.
According to Le Chatelier's principle, if any change is applied to a system at equilibrium, the system reacts in such a way as to counteract that change.
The principle explains that an increase in temperature causes equilibrium to shift in the endothermic direction, while a decrease in temperature causes it to shift in the exothermic direction.
When [tex]CaCO_3[/tex] is heated, it decomposes to form CaO and [tex]CO_2[/tex].
The balanced chemical equation is:
[tex]CaCO_3 (s)\rightarrow CaO (s) + CO_2 (g)[/tex]
The given reaction is an endothermic reaction as it absorbs heat.
Therefore, when the temperature increases, the equilibrium shifts towards the product side to counteract the change. On the other hand, when the temperature is decreased, the equilibrium shifts towards the reactant side to counteract the change.
In this case, the equilibrium will shift in the backward direction to produce more [tex]CaCO_3[/tex].
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The frequency of electromagnetic radiation required to promote an electron from n = 2 to n = 4 in a Bohr hydrogen atom is ________ Hz.
3.65 x [tex]10^{14}[/tex] Hz of electromagnetic radiation is needed to promote an electron in a Bohr hydrogen atom from n = 2 to n = 4.
How do you figure out the electromagnetic radiation frequency needed to move an electron in a Bohr hydrogen atom from n = 2 to n = 4?The following equation can be used to determine the frequency of electromagnetic radiation necessary to advance an electron from one energy level to another:
ΔE = hf
ΔE = -Rh[(1/n2²) - (1/n1²)]
When we solve for E using the value of Rh as a substitute, we obtain:
ΔE = -2.42 x [tex]10^{-19}[/tex] J
The following results are obtained when we enter the value of E and Planck's constant into the equation for frequency:
3.65 x [tex]10^{14}[/tex] Hz for f = E/h = (-2.42 x [tex]10^{-19}[/tex] J)/(6.626 x [tex]10^{-14}[/tex] J s)
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An earthquake happens along a line. Which of the subsequent isn't true about faults
A. It is found toward land
B. It is where fault cyclone starts
C. It will be found under the ocean
D. It is an opportunity within the Earth's crust
Answer: D.
Explanation: it is an opportunity within the Earth's crust.
Hydrochloric acid is a strong acid.
Ethanoic acid is a weak acid.
Describe a reaction that could be used to show the difference between a weak acid and a
strong acid.
You should explain why the weak acid and the strong acid give different results.
Answer:
One reaction that can be used to show the difference between a weak acid and a strong acid is the reaction with magnesium. When magnesium is added to hydrochloric acid, a vigorous reaction occurs, releasing hydrogen gas and forming magnesium chloride:
2HCl(aq) + Mg(s) → MgCl2(aq) + H2(g)
In contrast, when magnesium is added to ethanoic acid, a slow reaction occurs, releasing hydrogen gas and forming magnesium ethanoate:
2CH3COOH(aq) + Mg(s) → Mg(CH3COO)2(aq) + H2(g)
The reason for the difference in reaction rate between the two acids is due to their different levels of dissociation in water. Hydrochloric acid is a strong acid and completely dissociates in water, releasing a high concentration of hydrogen ions (H+) in solution. In contrast, ethanoic acid is a weak acid and only partially dissociates in water, releasing a low concentration of hydrogen ions in solution. As a result, the reaction between magnesium and hydrochloric acid is more vigorous because of the high concentration of hydrogen ions in solution, whereas the reaction between magnesium and ethanoic acid is slower due to the lower concentration of hydrogen ions in solution.
Explanation:
Answer:
correct comparative pH, such as, 0-3 (strong) 4-6 (weak) • named reaction, such as, with a reactive metal or a named carbonate • comparative results or observations of the named reaction, such as, faster reaction (strong) or greater volume of gas produced in a given time (strong)
Explanation:
Explanations of different results • weak acids are only partially ionised in aqueous solution • strong acids are completely ionised in aqueous solution/ greater concentration of H+ ions • aqueous solutions of acids at the same concentration/ powder, same temperature
Provide the products and balance the reaction below for the complete combustion of the fatty acid octanoic acid, C8H16O2
C8 H16 O2 (s) + O2(g) →?
A hydrocarbon comprises 92.3% carbon by mass and 7.7% hydrogen by mass. The compound's empirical formula will be oose answer: CH CH5, CH CH3, CH CH4.
What is octanoic acid's fatty acid?Octanoic acid is a straight-chain saturated fatty acid derived from heptane in which one of the terminal methyl group's hydrogens has been replaced by a carboxy group. Caprylic acid is another name for octanoic acid. It functions as an antibiotic agent, a human metabolite, and an E. coli metabolite.
Along the chain of saturated fatty acids, there are no double bonds or any functional groups. In the sense that all carbons are "saturated," the term "saturated" refers to hydrogen (apart from the carboxylic acid [-COOH] group)
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Calculate Kc for the following equilibrium:
2SO2(g) + O2(g) ⇌ 2SO3(g);
Kp = 2. 5 ×
1010 at 625 K
1.58 107 is the value of Kc for the specified equilibrium. In a chemical equilibrium, Kc is the equilibrium constant expressed in terms of the reactant and product concentrations.
The following relationship must be used to determine Kc from Kp:
[tex]Kc = Kp (RT) n[/tex]
where n is the difference in the number of moles of gas between the reactants and products, T is the temperature in Kelvin, and R is the gas constant.
We can write: for the specified equilibrium.
[tex]Δn = (2+1) - 2 = 1[/tex]
Using the values in the equation as substitutes:
[tex]2.5 × 10^10 = Kc(RT)^1[/tex]
To find Kc, we can rearrange the equation as follows:
[tex]Kc = Kp / (RT) (RT)[/tex]
The temperature must be converted to Kelvin:
[tex]625 K = 352 °C + 273.15 = 625.15 K[/tex]
Using the values in the equation as substitutes:
[tex]Kc = (8.314 J/mol K) / [(625.15 K) (2.5 1010)]Kc = 1.58 × 10^7[/tex]
Hence, 1.58 107 is the value of Kc for the specified equilibrium.
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When 3 M HCl and 0. 1 m BaCl2 are added to a solution of Na2 SO4
Option (B) is correct. Barium sulfate is insoluble in water and form a precipitate when 3M HCL and 0.1 BaCL2 are added.
In the solution we will be having, H+, Cl-, Ba2+, Na+ and SO42- ions.
HCL ----------> H+ + Cl-.
BaCl2 -------> Ba2+ + 2Cl-.
Na2SO4 -----> 2Na+ + SO42-.
The ions react each other and we get,
Ba2+ + SO42- ---------> BaSO4. Barium sulfate is known as the inorganic compound. This is a white crystalline solid which is odorless and insoluble in water. Barium sulfate occurs as the mineral barite which is the main commercial source of barium and materials prepared from it. It is insoluble in water it would form a precipitate.
Precipitation is defined as the process of transforming a dissolved substance into an insoluble solid from a super-saturated solution. The solid formed is called the precipitate in an aqueous solution.
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The complete question is,
When 3 M HCL and 0. 1 m BaCl2 are added to a solution of Na2 SO4,
A. no precipitate will form because BaSO4 is soluble in water
B. a precipitate will form because BaSO4 is insoluble in water
C. a precipitate will form because Na2SO4 is soluble in water
D. no precipitate will form because Na2SO4 is insoluble in water
Determine the total mass of Cu produced when 1.08 grams of Al reacts completely with 9.58 grams of CuSO4 to produce 6.85 grams of Alz(SO4)3.
Answer:
the balanced chemical equation for the reaction between aluminum (Al) and copper(II) sulfate (CuSO4) is:
2Al + 3CuSO4 → Al2(SO4)3 + 3Cu
This equation tells us that two moles of Al react with three moles of CuSO4 to produce one mole of Cu, and also produces one mole of Al2(SO4)3.
To determine the mass of Cu produced, we need to use the given masses of Al and CuSO4 to calculate how many moles of each reactant are present, and then use the mole ratios from the balanced equation to determine the moles of Cu produced. Finally, we can convert the moles of Cu to grams using its molar mass.
First, we calculate the moles of Al and CuSO4:
moles of Al = 1.08 g / 26.98 g/mol = 0.0400 mol
moles of CuSO4 = 9.58 g / 159.61 g/mol = 0.0600 mol
Next, we use the mole ratios from the balanced equation to determine the moles of Cu produced:
moles of Cu = (0.0400 mol Al) × (3 mol Cu / 2 mol Al) = 0.0600 mol Cu
Finally, we convert the moles of Cu to grams using its molar mass:
mass of Cu = 0.0600 mol × 63.55 g/mol = 3.81 g
Therefore, the total mass of Cu produced when 1.08 grams of Al reacts completely with 9.58 grams of CuSO4 is 3.81 grams.he balanced chemical equation for the reaction between aluminum (Al) and copper(II) sulfate (CuSO4) is:
2Al + 3CuSO4 → Al2(SO4)3 + 3Cu
This equation tells us that two moles of Al react with three moles of CuSO4 to produce one mole of Cu, and also produces one mole of Al2(SO4)3.
To determine the mass of Cu produced, we need to use the given masses of Al and CuSO4 to calculate how many moles of each reactant are present, and then use the mole ratios from the balanced equation to determine the moles of Cu produced. Finally, we can convert the moles of Cu to grams using its molar mass.
First, we calculate the moles of Al and CuSO4:
moles of Al = 1.08 g / 26.98 g/mol = 0.0400 mol
moles of CuSO4 = 9.58 g / 159.61 g/mol = 0.0600 mol
Next, we use the mole ratios from the balanced equation to determine the moles of Cu produced:
moles of Cu = (0.0400 mol Al) × (3 mol Cu / 2 mol Al) = 0.0600 mol Cu
Finally, we convert the moles of Cu to grams using its molar mass:
mass of Cu = 0.0600 mol × 63.55 g/mol = 3.81 g
Therefore, the total mass of Cu produced when 1.08 grams of Al reacts completely with 9.58 grams of CuSO4 is 3.81 grams.
Explanation:
Answer:2Al + 3CuSO4 → Al2(SO4)3 + 3Cu
Explanation:
Question 1
An animal's internal stimulus to feed in order to get the food needed for survival
An animal's internal stimulus to feed in order to get the food needed for survival is called hunger.
Hunger is a natural drive that motivates animals to search for and consume food in order to meet their nutritional needs and maintain their health and well-being.
This internal stimulus is regulated by the hypothalamus, a region of the brain that controls a variety of bodily functions, including hunger and satiety. When an animal's energy levels drop or its stomach is empty, the hypothalamus sends signals to the rest of the body to increase the desire for food.
Once the animal has eaten enough to satisfy its nutritional needs, the hypothalamus sends signals to decrease the desire for food and the animal stops eating. This process helps to ensure that animals get the nutrients they need to survive and maintain their health.
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