The equation PV=nRT from the ideal gas law can be used to calculate the sample pressure. Use the conversion factor 1 atm = 760 torr to find the pressure in torr. You'll get 34,877 Torr as a result.
How to solve?the ideal gas law equation is used to determine the pressure of the sample.
PV=nRT, where
P - the pressure of the hydrogen sample
V - the volume it occupies
n- the number of moles of gas;
R- the universal gas constant, usually given as 0.082atm⋅L/mol⋅K
T- the temperature of the gas - expressed in Kelvin
So, rearrange the ideal gas law equation to solve for
P, the pressure of the gas.
P=nRTV
Put in your values and find
P - do not forget that you need to use the volume in liters and the temperature in Kelvin
P=9.94 x 10^3 mol ⋅0.082atm⋅L/mol⋅K⋅(273.15−199)K/1.3L
P=3.4877 atm
To get the pressure in torr, you need to use the conversion factor
1 atm = 760 torr
This will get you
3.4877atm⋅760 torr/1atm=34,877torr
What distinguishes real gas from ideal gas?Gases come in two varieties. Gases that are ideal and real. Given that an ideal gas has very small particles, nearly negligible mass, and no volume A point mass is also referred to as an ideal gas. Real gas molecules, despite being small particles with volume, occupy space.
The author of the ideal gas equation?One equation, developed through the experimental work of many people, particularly Robert Boyle, Jacques A. C. Charles, and Joseph Gay-Lussac, relates the pressure, volume, temperature, and amount of an ideal gas.
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In the structure illustrating the bonding in ethene, c2h4, the two arrows point to what type of bond or bonds?.
The straight arrows in the structure c2h4 that represent binding bonding in ethene point to the bond.
What do you mean bond?Bond are fixed-income products that reflect loans from investors to borrowers . An bond can be compared to the an agreement outlining the terms of the loan and the associated payments between both the lender and borrower.
What is bond in relationship?A strong sense of friendship, affection, or shared values which brings people together is referred to as a bond. We developed a very unique friendship as a result of the event. The tie that bound them was [+ between]. Synonyms include bind, link, tie, and union. Additional words for bond.
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consider the following voltaic cell which of the following statements is false? the al electrode is the anode the al electrode will tose mass the pt electrode is the cathode the pt electrode will gain mass electrons flow from the al electrode to the pt
The al electrode is the anode is false according to the given voltaic cell equation.
When making contact with a nonmetallic component of a circuit, an electrode is used as an electrical conductor. Depending on the battery type, electrodes, which are necessary components, can be made of a number of materials. To make contact with a nonmetallic component of a circuit, a conductor called an electrode is used. Medical equipment, semiconductors like diodes, and electrochemical cells all frequently use electrodes.
A spontaneous oxidation-reduction reaction produces an electric current in a voltaic cell, which bears the names of scientists Luigi Galvani and Alessandro Volta. An electrochemical device known as a voltaic cell harnesses the power of a chemical reaction to generate electricity. Anodes are electrodes where oxidation takes place, making them important components of a voltaic cell.
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the half-life of strontium-90 is 28 years. how long will it take a 80-mg sample to decay to a mass of 48 mg? (round your answer to the nearest whole number.)
The half-life of strontium-90 is 28 years. how long will it take a 80-mg sample to decay to a mass of 48 mg is 56years.
What is half life?
The duration of time it takes for one-half of a radioactive isotope to decay is known as the half-life. A particular radioactive isotope's half-life is constant; it is unaffected by external factors and is unrelated to the isotope's starting concentration.
What is decay?
A reduction in quantity, activity, or force, as in. Chemistry: Radioactive material's radioactive atoms naturally start to decrease in number. Natural disintegration in physics (as of an atom or a particle).
Therefore, half-life of strontium-90 is 28 years. how long will it take a 80-mg sample to decay to a mass of 48 mg is 56years.
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What is meant by the phrase "a consistent method of measurement"?
O A. The same person performs all measurements.
B. Variables are measured using the same method each time.
OC. All measurements are in non-Sl units.
O D. You only take one measurement.
Many organic reactions involve more than a single step. A reactive species that formed in one step and used up in the next is called a reactive _____. Such a reactive species can sometimes be isolated, even though it may be short-lived, unlike the ____ state, which is the unstable energy maximum for each step.
A reactive species that formed in one step and is used up in the following reaction is called a reactive: (intermediate). Sometimes, it can be isolated, even though it may be short-lived, unlike the: (transition state).
What is the difference between the reactive intermediate and the transition state?An intermediate from a reactive species has a discrete lifetime, from as long as many days to just a few nanoseconds. Meanwhile, a transition state lasts just one bond vibration cycle. The other difference they have is an intermediate tends to be stable with high energy (although it is less stable than its reactants and products). In contrast, the transition state tends to be less stable than the intermediate.
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which of the following is not a clue that a chemical reaction is taking place A. solid formation B. unexpected color change C. texture change D. new substance is formed
Answer: C: Texture change is not a clue that a chemical reaction is taking place.
Explanation: During a chemical reaction, the atoms in the reactants rearrange to form new products. This process can result in the formation of a solid, a change in color, or the formation of a new substance. However, the texture of the substances involved in the reaction may or may not change, and it is not a reliable indicator of a chemical reaction.
Therefore, the correct answer is C.
a certain half-reaction has a standard reduction potential 0.07 v. an engineer proposes using this half-reaction at the anode of a galvanic cell that must provide at least of electrical power. the cell will operate under standard conditions. note for advanced students: assume the engineer requires this half-reaction to happen at the anode of the cell.
The cathode half cell will have no maximum reduction potential and the engineer can choose an appropriate cathode that will deliver atleast 0.13V or more power
What is a cathode ?
An electrical device with polarized current has a metallic electrode called a cathode through which current is discharged. The electrode in a polarized electrical device via which current enters from an external circuit is known as an cathode, on the other hand.
what is an half-reaction?
The portion of a larger reaction known as a half-reaction constitutes either an oxidation or a reduction on its own. For a redox reaction to be fully described, it requires two half-reactions, one oxidation and one reduction.
The given half cell will work as the anode of the galvanic cell. Oxidation occurs at the anode and the standard oxidation potential E0ox = -E0red. Therefore, the given half cell will have oxidation potential E0ox = -(-1.07 V) = +1.07 V.
The cell potential is given as E0cell = E0red + E0ox and the cell potential will have a value of atleast 1.20 V. Therefore, put E0cell = 1.20 V and get
E0red = E0cell – E0ox = (1.20 V) – (1.07 V) = 0.13 V.
If the cathode half cell has a reduction potential less than 0.13 V, then the cell potential of the galvanic cell will fall below 1.20 V. Hence, the cathode half cell must have a minimum standard reduction potential of +0.13 V
The cell is supposed to deliver atleast 1.20 V power. However, the cell can deliver more than 1.20 V power. Say, the cell delivers 1.30 V power. Then putting E0cell = 1.30 V, we have,
E0red = (1.30 V) – (1.07 V) = 0.23 V.
Hence, the cathode half cell will have no maximum reduction potential and the engineer can choose an appropriate cathode that will deliver atleast 0.13V or more power.
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5. a sample has a density of 1.37 x 105 cfu/ml. what sample volume should yield a countable plate? which two dilution tubes could be used to produce this sample volume? how?
The original concentration is 1.37 × 10⁵ CFU / ml
In order to attain a countable plate, the number of CFU must be present in between 20 and 200 per ml.
Let us take 0.1 ml and dilute it to 1 ml.
This minimizes the concentration to 1.37 × 10⁵ × 10⁻¹ = 1.37×10⁴CFU/ ml
In order to minimize the concentration in between 20 and 200, it can be reduced to 1.37 × 10²
The only number using the numerals "137" that is between 20 and 200 colonies is 137. (The closest numbers are 1370 and 1.37, but they are out of the countable range.) This is how many colonies you would expect on a correctly diluted plate.
The final concentration = 1.37 × 10² CFU/ml
Initial concentration = 1.37 × 10⁵ CFU/ml
Volume of sample with 1.37 × 10² CFU = 1.37 × 10² CFU × (1 ml / 1.37 × 10⁵ CFU)
= 1.0 × 10⁻³ ml
So, 1.0 × 10⁻³ ml volume to be taken to obtain countable value, 137 CFU.
An FDF of 10 ^ - 3 can be produced by plating 1 mL of DF 10 ^ - 3 or 0.1 mL of DF 10 ^ - 2 This is possible be- cause plating one-tenth of the volume is equivalent to another ten-fold dilution.
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nitric acid (63 g) and sodium hydroxide (60 g) are mixed. determine how many grams of water will form.
17.99 g of water will formed when nitric acid (63 g) and sodium hydroxide (60 g) are mixed.
When nitric acid and sodium hydroxide are mixed, a neutralisation reaction takes place, with the salt created by the two substances and water serving as the reaction result. The rational response to the statement in this instance is:
Na(OH) + HNO3 ⇒ NaNO3 + H2O
• The formula for HNO3's molar mass is 3xmO + mH + mN, or 3x15.99g + 1g + 14g = 62.97 g/mol.
• The formula for NaOH molar mass is: mO + mH + mNa = 15.99g + 1.00g + 22.99g = 39.98 g / mol.
18g of water and 63g of HNO3
17.99 g of water from 62.97 g of HNO3
62.97 g divided by 18 g and 63 g equals 17.99 g of water.
As a result, 17.99 g of water will form.
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why should salt be prepared in a dry environment
Answer:
because salt has a properties of disolving
the titration of 25.0 ml of an unknown concentration h2so4 solution requires 83.6 ml of 0.24 m lioh solution. what is the concentration of the h2so4 solution (in m)?
The titration of 25.0 ml of an unknown concentration h2so4 solution requires 83.6 ml of 0.24 m lioh solution. 0.20M is the concentration of the h2so4 solution (in m).
We'll begin by calculating the number of mole of LiOH in 83.6 mL of 0.12 M LiOH solution.
Volume = 83.6 mL = 83.6 / 1000 = 0.0836 L
Molarity of LiOH = 0.12 M, Mole of LiOH =?
Mole = Molarity × Volume
Mole of LiOH = 0.12 × 0.0836, Mole of LiOH = 0.010032 mole
Next, we shall determine the number of mole of H₂SO₄ needed to react with 0.010032 mole of LiOH.
2LiOH + H₂SO₄ —> Li₂SO₄ + 2H₂O
From the balanced equation above, 2 moles of LiOH reacted with 1 mole of H₂SO₄. Therefore,
0.010032 mole of LiOH will react with = = 0.005016 mole of H₂SO₄.
Finally, we shall determine the molaity of the H₂SO₄ solution.
Mole of H₂SO₄ = 0.005016 mole
Volume = 25 mL = 25 / 1000 = 0.025 L
Molarity of H₂SO₄ =?
Molarity = mole / Volume, Molarity of H₂SO₄ = 0.005016 / 0.025, Molarity of H₂SO₄ = 0.20 M
Percent concentration: This refers to how much solute dissolves in 100 g of solvent. If a solution's concentration is 20%, we know that there are 20 g of solute in every 100 g of solution. As an illustration, a solution is made by mixing 10 g of salt and 70 g of water. Concentration makes it less likely that you will overlook crucial facts. You can memorize information more quickly if you maintain your focus. Medical, cognitive, or psychological issues, sleep disorders, prescription side effects, alcoholism, or drug usage are all possible causes of concentration issues. Anxiety, sadness, bipolar illness, emotional trauma, and stress are among the psychological disorders that can make it difficult to concentrate.
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solubility curves are used to determine if a solution is unsaturated, saturated, or supersaturated at a specific pressure. true or false
Solubility curves are used to determine if a solution is unsaturated, saturated, or supersaturated at a specific pressure is a true statement.
Solubility curves are graphs that show the amount of a substance that can be dissolved in a given amount of liquid at a given temperature. The curves are usually plotted on the x-axis with the temperature and on the y-axis with the amount of solute dissolved.
Solubility curves are used to predict the solubility of a solute in a given solution at a given temperature. Solubility curves can also be used to explain the effect of temperature on solubility. For example, when the temperature increases, the solubility of a solute will increase, and vice versa.
Solubility curves can also be used to explain the effect of pressure on solubility. As the pressure increases, the solubility of a solute will decrease, and vice versa. Solubility curves can also be used to explain the effect of pH on solubility. As the pH increases, the solubility of a solute will decrease, and vice versa.
It is thus useful in understanding about the solution whether it is saturated, unsaturated or super saturated and so on.
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Classify each substance as a strong electrolyte, weak electrolyte, or nonelectrolyte:
(a) Sodium permanganate (b) Acetic acid (c) Methanol (d) Calcium acetate
The substance is classified as a strong electrolyte, weak electrolyte, or nonelectrolyte, as follows:
Sodium permanganate (NaMnO₄) is strong electrolytesAcetic acid (CH₃COOH) is weak electrolytes,Methanol (CH₃OH) is nonelectrolytesCalcium acetate [Ca(C₂H₃O₂)₂] is strong electrolytesTherefore, sodium permanganate (NaMnO₄) is strong electrolytes, acetic acid (CH₃COOH) is weak electrolytes, methanol (CH₃OH) is nonelectrolytes while calcium acetate [Ca(C₂H₃O₂)₂] is strong electrolytes
An electrolyte is a substance that chemically changes when an electric current is passed through it.
Strong electrolytes are electrolytes that are almost completely soluble in water. when Sodium permanganate dissolved in water The random movement of the potassium permanganate particles causes a dark purple solution to appear in the water at the bottom of the beaker. The purple solution gradually diffuses into the rest of the water in the beaker, resulting in a less thick but same-colored purple solution.
Weak electrolytes are electrolytes that are completely insoluble in water.
A non-electrolyte is a substance that does not conduct electric current in aqueous solution or in the molten state.
therefore, the strong electrolyte are Sodium permanganate (NaMnO₄) and Calcium acetate [Ca(C₂H₃O₂)₂], nonelectrolytes is Methanol (CH₃OH) while Acetic acid (CH₃COOH) is weak electrolytes.
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suppose rory applies a current to an aqueous solution of sodium bromide. which species is produced at the cathode? o2(g)o2(g) na(s)na(s) h2(g)h2(g) br2(l)br2(l) which species is produced at the anode?
When current is applied to an aqueous solution of sodium bromide,
Na is produced at the cathode
Br₂ is produced at the anode
This reaction is an electrochemical reaction, which is defined as " A process involving flow of electrons between an electrode and an electrolyte by passing of electricity". The electrochemical reaction that takes place when rory allies current to an aqueous solution of sodium bromide is given below:
2Na + 2Br→ Br₂ + Na₂⁺+ 2OH⁻
Reactions taking place at cathode:
2Na + 2e⁻ → 2Na
2Na + H₂O → Na⁺ + OH⁻ + H₂
Reaction taking place at anode:
2Br⁻ → Br₂ + 2e⁻
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What happens to the chemistry of the seawater as more co2 is absorbed into the oceans?.
The planet's PH decreased, thereby making the water there increasingly acidic.
Why does seawater include compounds?There are numerous distinct chemicals in seawater. Because when freshwater in water evaporates and salt is left behind, several of these chemicals can be seen. Pure substance made up water and oxygen is called water, or H2O.
Is seawater a type of chemical solution?Rainwater and dissolved chemical substances combine to become seawater. A great solvent is water. Juices that dissolve other compounds are known as solvents. Numerous solutes are present in the majority of the earth's water, which includes the moisture in oceans, pools, rivers, and ponds.
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the Ka of a weak monoprotic acid is 1.80×10−5. what is the ph of a 0.0769 m solution of this acid? ph
The Ka of a weak acid is the acid dissociation constant, which is a measure of the strength of the acid.
The Ka of a weak monoprotic acid is basically 1.80×10−5, which is a very weak acid.
To calculate the pH of a 0.0769 m solution of this acid, we first need to calculate the concentration of the hydrogen ions (H+). So, the Ka expression for a weak acid is:
Ka = [H+][A-] / [HA]
Where [H+] is the concentration of hydrogen ions, [A-] is the concentration of the conjugate base, and [HA] is the concentration of the acid.
As we know the Ka and the concentration of the acid (0.0769 M), we can rearrange the equation to solve for [H+]:
[H+] = Ka * [HA]
[H+] = 1.80 x 10-5 * 0.0769
[H+] = 1.38 x 10-6 M
Now that we have the concentration of hydrogen ions, we can calculate the pH of the solution using the equation:
pH = -log[H+]
pH = -log(1.38 x 10-6)
pH = 5.85
What is a Monoprotic acid?
In a chemical reaction, a monoprotic acid can donate one proton (H+) per molecule. A single hydrogen atom is typically bonded to an oxygen, sulfur, or nitrogen atom in these acids. Hydrochloric acid, acetic acid, and sulfuric acid are all examples of monoprotic acids. When a proton is donated, monoprotic acids can form conjugate bases. These conjugate bases are known as monobasic anions and are frequently used in acid-base equilibrium reactions as conjugate pairs.
What is pH?
The pH of a solution determines its acidity or alkalinity. It is measured on a scale of 0 to 14, with 7 representing neutral. Solutions with a pH less than 7 are considered acidic, while solutions with a pH greater than 7 are considered basic or alkaline. The lower the pH number, the greater the acidity, and the higher the pH number, the greater the alkalinity.
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does clapeyron equation, in thermodynamics, help to determine the enthalpy of vaporization hfg at a given temperature from the p, v, t data alone?
Yes, using only the p, v, and t values, the Clapeyron solution in thermodynamics may be used to compute the energy of vaporization at a particular temperature.
What does the chemistry term "equation" mean?Reaction equation are symbolic depictions of chemical reactions where the reactants and products are stated in relation to the following chemical formulae.
Equation and response are what?What is an equations and a chemical reaction? In a chemical change, bonds between molecules of the reagent are destroyed and new bonds between molecules of the product are established to create a new substance. A chemical formula is nothing more than a statement of fact that represents how reactants generate products.
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what structural feature seems to distinguish the molecules in which the real bond angle is less than the model bond angle?
Lone pair repulsion seems to distinguish the molecules in which the real bond angle is less than the model bond angle.
What is Lone pair repulsion?
Sometimes referred to as an unshared pair or a non-bonding pair, a lone pair is a pair of valence electrons that are not shared with another atom in a covalent bond. The outermost electron shell of an atom is where lone pairs are discovered.
Therefore, Lone pair repulsion seems to distinguish the molecules in which the real bond angle is less than the model bond angle.
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what did Dmitri Mendeleev do that set him apart?
When the adhesive forces between a liquid and the walls of a capillary tube are greater than the cohesive forces within the liquid.
The liquid will rise above the surrounding liquid due to the attractions when the adhesive forces are stronger than the cohesive forces between a liquid and the walls of a capillary tube.
What is capillary tube?In a mechanism known as capillary action, liquid flows up into very thin tubes made of rigid materials such as plastic or glass termed capillary tubing or capillary tubes (capillarity). a tube used to regulate the flow of refrigerant that has an interior diameter and length that are calibrated. Additionally, it links the remote bulb to the thermostat and/or the thermostatic expansion valve.
What is capillary tube formula and its example?Surface tension is another factor that causes a liquid column inside of a tiny capillary tube to rise. (h)=2Trg is the formula for capillary rise.
Capillary action is exemplified by the uptake of water in porous materials like plaster and paper, the wicking of paint between brush hairs, and the transport of water through sand.
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what is the mole fraction of water in a solution that has 1.0 mole of sugar (342.3 g/mol) dissolved in 0.45 l of water (450 g; about 25 moles)?
The Mole Fraction of water in a solution is 0.961.
The Mole Fraction is the product of the molecular weight of one component divided by the molecular weight of the entire mixture. When two components with reactive natures are combined, it is quite helpful. The mole fraction is the ratio of the two elements.All of the mole fractions that are present in the given mixture add up to one.XA + XB = 1.The mole percentage is produced by multiplying the mole fractions by 100.The expression "mole fraction" has no units or dimensions.[tex]Mole=\frac{H2O}{Sugar+H2O}[/tex]Mole= 25/1 +25=0.961
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assume the reaction produces 0.0032 moles of h2 gas with a volume of 0.0806 l, pressure of the dry h2 of 0.9720 atm and temperature of 297.2 k. calculate the ideal gas constant, r in units of (l atm/(mol k)).
The ideal gas constant, r, has a unit of (l atm/mol k) of 0.0821 l atm/ mol k.
The formula for the ideal gas constant is
PV = nRT
P = pressure
V=volume
n= number of moles,
R=ideal gas constant, and
T=kelvin temperature.
When all the values are entered into the formula, we get:
[tex]R= \frac{PV}{nT} \\R=\frac{ 0.9720* 0.0806}{0.0032*297.2}[/tex]
[tex]R= \frac{0.0783}{0.9510}[/tex]
[tex]R= 0.0821[/tex]
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Which of the following is true regarding the size of gas molecules? Select the correct answer below: O the molecules comprising the gas are too large to undergo movement and collisions the molecules of gas grow in size with each collision they experience the molecules comprising the gas are negligibly small compared to the distances between them O none of the above
True statement regarding the gas molecules is O the molecules comprising the gas are too large to undergo movement and collisions the molecules of gas grow in size with each collision they experience the molecules.
A gas which obeys the gas laws and the gas equation PV=nRT strictly at all temperatures and pressures is said to be an ideal gas.The molecules of ideal gases are assumed to be volume less points with no attractive forces between one another. But no real gas strictly obeys the gas equation at all temperatures and pressures. Deviations from ideal behaviour are observed particularly at high pressures or low temperatures.
The causes of deviations from ideal behaviour may be due to the following two assumptions of kinetic theory of gases.
The volume occupied by gas molecules is negligibly small as compared to the volume occupied by the gas.
The forces of attraction between gas molecules are negligible.
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A single cell uses about 10 million atp molecules per second. Explain how cells use the energy and recycle the materials in atp.
Ten million Atps are used by a single cell every second, and every 20 to 30 seconds, all of those molecules are recycled.
What does "molecular" mean?A molecule refers to the smallest subunit of a chemical that keeps its content and capabilities. It is made up of two or so more atoms that are joined together by chemical bonds. Chemistry is built on molecules.
Water: A Molecule or Not?Nanoparticles are created when elements come together. Two hydro (H) nuclei and one oxide (O) atom make up the three atoms that make up a water molecule. This is why water is occasionally abbreviated as H2O. There are billions of molecules of water in a given drop of liquid.
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this is the chemical formula for methyl tert-butyl ether (the clean-fuel gasoline additive mtbe):a chemical engineer has determined by measurements that there are moles of carbon in a sample of methyl tert-butyl ether. how many moles of hydrogen are in the sample?be sure your answer has the correct number of significant digits.
12 moles of hydrogen according to dalton's atomic theorey in methyl tert-butyl ether (the clean-fuel gasoline additive mtbe.
The mole concept is a helpful way to quantify the amount of a substance. When dealing with particles at the atomic (or molecular) level, it is known that even one gram of a pure element contains an enormous number of atoms. The mole concept is frequently used in this context. The most popular unit of measurement is the "mole," which is a count of a significant number of particles.
The number 6.02214076*1023, also known as the Avogadro constant, is frequently denoted by the letter "NA". The elementary entities that can be represented in moles include atoms, molecules, monoatomic and polyatomic ions, as well as other particles (like electrons).
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Biodiesel—a fuel comprising long-chain fatty acid methyl esters (FAMEs) derived from vegetable oils or animal fats, designated B100 and meeting standard requirements.
Biodiesel is a type of diesel fuel made from long-chain fatty acid esters derived from plants or animals. Thus this statement is true.
What is biodiesel ?Biodiesel is a domestically produced, clean-burning, and renewable alternative to petroleum diesel. Using biodiesel as a vehicle fuel improves energy security, air quality and the environment, and safety.In contrast to the vegetable and waste oils used to power converted diesel engines, biodiesel is a drop-in biofuel, which means it is compatible with existing diesel engines and distribution infrastructure.However, because most engines can't run on pure Biodiesel without modification, it's usually blended with petroleum-based diesel. Biodiesel blends can also be used as heating oil.Recycled grease that has not been converted to biodiesel, raw or refined plant oil, or refined plant oil is not biodiesel and should not be used as vehicle fuel.To learn more about biodiesel refer :
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What is the relationship between dipole moment and the distance between the charges?
directly proportional
inversely proportional
they are equivalent
they are unrelated
directly proportional
The option (a) is correct - directly proportional
What is an dipole?
When two charges are spaced apart, they form a dipole, which consists of oppositely charged pairs of charges with equal magnitudes. When there is a difference in charges, or more precisely when the atoms that make up the molecule have an electric charge, dipoles are present.
What is an charges?
The physical quality of matter—its electric charge—is what causes it to feel a force when exposed to an electromagnetic field. Protons and electrons, the two types of charge carriers, typical carry positive and negative electric charges.
Therefore, option (a) is correct - directly proportional
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if 8.00 moles of nh₃ of and 10.00 moles of o₂ react in the following reaction, how many moles of which reactant will be left over? 4 nh₃ (g) 5 o₂ (g) → 4 no (g) 6 h₂o (g)
8 mol NH3 X (5 mol O2 / 4 mol NH3) = 10 mol O2The stoichiometric ratio of the two reactants is used to mix them. If the reaction is successful, neither reactant will be left behind.
How are product moles determined?Knowing a product's mass and molar mass—the mass of one mole of the product—is necessary to compute the moles of a given substance. After that, you divide the product's mass by its molar mass.
Molar mass of NaOH = (23.0 + 16.0 + 1.0) g/mol = 40.0 g/mol
Molar mass of Ni(OH)₂ = (58.7 + 16.0×2 + 1.0×2) g/mol = 92.7 g/mol
Initial no. of moles of NaOH = (31.0 g) / (40.0 g/mol) = 0.775 mol
Initial no. of moles of Ni(NO₃)₂ = (1.00 mol/L) × (0.550 L) = 0.550 mol
Balanced equation for the reaction:
2NaOH(aq) + Ni(NO₃)₂(aq) → Ni(OH)₂(s) + 2NaNO₃(aq)
Mole ratio NaOH : Ni(NO₃)₂ : Ni(OH)₂ = 2 : 1 : 1
If NaOH completely reacts, Ni(NO₃)₂ needed = (0.775 mol) × (1/2) = 0.3875 mol < 0.550 mol
Hence, Ni(NO₃)₂ is in excess, and NaOH is the limiting reactant.
No. of moles of NaOH reacted = 0.775 mol
No. of moles of Ni(OH)₂ formed = (0.775 mol) × (1/2) = 0.3875 mol
Mass of Ni(OH)₂ formed = (0.3875 mol) × (92.7 g/mol) = 35.9 g
Which of the reactants can you identify?In a chemical equation, the substance or substances to the left of the arrow are referred to as reactants. A substance that is present when a chemical reaction first begins is known as a reactant. Products refer to the material or substances to the right of the arrow.
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In a balanced chemical equation, a. Atoms are conserved. B. Coefficients are equal. C. Molecules are equal. D. Energy is not conserved.
Atoms are conserved in a chemical equation that is balanced. The choice that is best is A. We can see two copper, four chloride, four iodine, four potassium, and four atoms present
What sort of chemical equation would you use?
Chemical equations are used to depict how reactants change into products. For instance, iron sulfide is created when iron (Fe) and sulfur (S) combine (FeS). FeS = S(s) + Fe(s) (s) An iron-sulfur interaction is indicated by the plus symbol.
What do chemical equation solutions consist of?
They were equations that use chemical symbols and formulae to express chemical reactions. The reactants are shown on the left side of a chemical equation, and the products were shown on the right.
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number of electrons: 3???? electrons how many of those electrons are unpaired? number of unpaired electrons:
To calculate the number of unpaired electrons, first determine the element's atomic number, then write the configuration in the ground state, and then subtract the number of electrons from the outer shell based on the oxidation state. So there are four unpaired electrons. So there are three unpaired electrons.
This means that these electrons are not paired or occur as electron couples. We can easily determine whether an atom has unpaired electrons by writing down its electron configuration. Atoms with these electrons have paramagnetic or ferromagnetic properties.
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