Answer:
Evaporation of ocean water and the formation of sea ice both increase the salinity of the ocean.
Explanation:
Consider the incorrectly balanced combustion equation:
2C6H6 + 602 => 12CO2 + 6H2O
Select ALL elements that are not balanced.
Carbon
Hydrogen
Oxygen
How many molecules are present in 135 g of Teflon C2F4
The elemental particles like the atoms, molecules and compounds present in a given substance is called an Avogadro's number. This number is expressed as [tex]N_{A}[/tex] and is equal to [tex]6.022 \times 10^{23} \;\rm mol^{-1}[/tex].
[tex]8.06 \times 10 ^{23}[/tex] molecules are present in 135 g of Teflon [tex]\rm C_{2}F_{4}[/tex].
How to calculate the molecules?Given,
Mass of the Teflon = 135 gThe molecular weight of [tex]\rm C_{2}F_{4}[/tex] = 100.02 g/molWe have 135 g, so moles will be:
[tex]\begin{aligned}\rm Moles (n) &=\dfrac{ \rm Mass }{\;\rm Molar \;\rm mass}\\\\\rm n &= \dfrac{135 \rm g }{100.02 \rm g/mol} \\\\\rm n &= 1.34 \;\rm mole\end{aligned}[/tex]
Hence,
1 mole contains [tex]6.022140857 \times 10^{23}[/tex] (Avogadro's number)
So 1.34 moles will contain,
[tex]\begin{aligned}&=1.34 \times 6.022140857 \times 10^{23}\\\\&= 8.06 \times 10 ^{23}\;\rm molecules\end{aligned}[/tex]
Therefore, [tex]8.06 \times 10 ^{23}[/tex] molecules are present in 135 g of Teflon [tex]\rm C_{2}F_{4}[/tex].
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250 mL of water is collected during a combustion reaction. The temperature in the
room is 23 °C and the pressure is 105 kPa. How many moles of water was collected?
Answer:
0.011 moles
Explanation:
Applying,
PV = nRT.................... Equation 1
Where P = Pressure, V = Volume, n = number of moles, R = Molar gas constant, T = Temperature.
Make n the subject of the equation
n = PV/RT.................. Equation 2
From the question,
Given: P = 105 kPa = (105×0.00986923) = 1.036 atm, V = 250 mL = 0.25 L, T = 23 °C = (273+23) = 296 °C
Constant: R = 0.082 atm.dm³/K.mol
Substitute these values into equation 2
n = (1.036×0.25)/(0.082×296)
n = 0.011 moles
what class is sodiumtrioxocarbonate(IV) strong or weak base and why?
Answer:
Strong Base
Explanation:
sodiumtrioxocarbonate(IV) Na2CO3 exists in various forms such as; an anhydrous form or in a crystalline form. Usually, the manufacturing process of sodiumtrioxocarbonate(IV) Na2CO3 is known as the Solvay process.
Now, upon reaction, Na2CO3 reacts to yield CO⁻₃. That appears to be a conjugate base of a weak acid. Thus, the occurrence of the removal of H⁺ resultt into Carbonic acid, i.e. a Strong Base.
There are ____ neutrons, ___ protons, and ____ electrons in 238U+5
Answer:
Explanation:
The atomic number of uranium (see periodic table) is 92, and the mass number of the isotope is given as 238. Therefore, it has 92 protons, 92 electrons, and 238 — 92 : 146 neutrons
Uranium has an atomic number of 92. There are 146 neutrons, 92 protons, and 92 electrons in 238U+5. The number of neutrons can vary from 141 to 146.
What is uranium ?Chemical element uranium has the atomic number 92 and the letter U. It is an actinide metal in the periodic table's silvery-gray series. There are 92 protons and 92 electrons in an atom of uranium, of which 6 are valence electrons.
Since uranium has an atomic number of 92, its atomic structure consists of 92 protons and 92 electrons. The nucleus of U-238 contains 146 neutrons, but this number can range from 141 to 146.
With 92 protons and 146 neutrons, Uranium-238 is the heaviest element in nature. The overall mass and charge of the nucleus are 238 nucleons, or +92.
Thus, Uranium has an atomic number of 92. There are 146 neutrons, 92 protons, and 92 electrons in 238U+5.
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A galvanic cell generates a cell potential of 0.32V when operated under standard conditions according to the reaction above. Which conditions are needed to construct a similar cell that generates the lowest cell potential?
The complete question is shown in the image attached to this answer.
Answer:
C
Explanation:
Let us quickly remember that the EMF of a cell under non standard conditions in given by the Nernst equation.
This equation states that;
E = E°cell - 0.592/n log Q
Where
E = EMF under non standard conditions
E°cell= standard EMF of the cell
n = number of electrons transferred
Q = reaction quotient
If the reaction quotient is greater than 1 then cell potential is less than the standard cell potential.
The cell that generates the lowest cell potential is the cell depicted in option C because Q has the greatest positive value(Q<1).
The cell potential is the redox potential that measures the acquired to lost electrons at the electrodes. The lowest cell potential is generated by cell C with 0.5 M.
What is EMF?EMF is the electromotive force that is the total of the electric potential difference produced at the half cells of the galvanic cell (electrochemical cell).
EMF of the cell is given as,
[tex]\rm E = \rm E^{\circ} - \dfrac{0.592}{n}\; log Q[/tex]
Here, E is the electromotive force, [tex]\rm E^{\circ}[/tex] is the standard EMF, n is the number of the transferred electrons, and Q is the reaction quotient.
When the reaction quotient (Q) is greater than 1 then, cell potential will be less than standard cell potential.
Therefore, cell C with 0.5 M and Q > 1 is a similar cell.
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Which type of reaction to alkenes generally undergo?
Answer:
Two types of reaction
Explanation:
Alkanes undergo only substitution reactions but alkenes and alkynes undergo both substitution and addition reactions
10 points of bullying
Answer: Bullying is not good!
What volume in liters of fluorine gas is needed to form 999 L of sulfur hexafluoride gas if the following reaction takes place at 2.00 atm and 273.15 K: S(s) + 3F₂(g) → SF₆ (g)
Answer: A volume of 2997 liters of fluorine gas is needed to form 999 L of sulfur hexafluoride gas if the given reaction takes place at 2.00 atm and 273.15 K.
Explanation:
The given reaction is as follows.
[tex]S(s) + 3F_{2}(g) \rightarrow SF_{6}(g)[/tex]
This show that 3 moles of fluorine is reacting to give 1 moles of sulfur hexafluoride.
According to the ideal gas formula,
PV = nRT
This means that volume of a gas is directly proportional to the number of moles. Hence, volume of fluorine required is calculated as follows.
[tex]3 \times 999 L\\= 2997 L[/tex]
Thus, we can conclude that a volume of 2997 liters of fluorine gas is needed to form 999 L of sulfur hexafluoride gas if the given reaction takes place at 2.00 atm and 273.15 K.
Name the functional group in the
following molecule:
CH3CH2OCH2CH3
A ester
B. acid anhydride
C ketone
D. ether
Answer:
d
Explanation:
i just did it
The functional group in the following molecule CH₃CH₂OCH₂CH₃ is ether.
What is functional group?Functional group is defined as a substituent or group of atoms or an atom which causes chemical reactions.Each functional group will react similarly regardless to the parent carbon chain to which it is attached.This helps in prediction of chemical reactions.
The reactivity of functional group can be enhanced by making modifications in the functional group .Atoms present in functional groups are linked to each other by means of covalent bonds.They are named along with organic compounds according to IUPAC nomenclature.
Functional group inter conversion is also possible by retro -synthesis.In some cases , functional groups can be charged molecules.
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why are some properties of water different than those of the reactants gases
Answer:
The difference in the properties of water can be attributed to physical changes to the hydrogen and oxygen atoms on a subatomic level. The properties of the gases are combined to give water its properties. When substances chemically combine, products with completely different properties form.
Answer:
They are composed of different atoms
Explanation:
The guy above me said it better :|
desperate, please help ASAP and check over
what is a recessive allele in a genotype is represented by pleaseee helpp
How many grams of NaCI are dissolved in a 500.0 mL of a 0.04M solution of NaCI?
A: 0.05 g
B: 1.17 g
C: 1.46 g
D: 2.92 g
Answer:
B 1.17
Explanation:
There is .02 mols of nacl in a .4M solution
so you multiply by the molar weight of NaCl (58.44)
For the reaction: 2H2 + O2 → 2H2O, how many grams of water are produced from
6.00 moles of H2?
Answer:
108 g
Explanation:
2H₂ + O₂ → 2H₂OFirst we convert 6.00 moles of H₂ into moles of H₂O, using the stoichiometric coefficients of the reaction:
6.00 mol H₂ * [tex]\frac{2molH_2O}{2molH_2}[/tex] = 6.00 mol H₂OThen we can convert 6.00 moles of H₂O into grams, using the molar mass of water:
6.00 mol H₂O * 18 g/mol = 108 gThe answer is 108 grams of water.
What is the Chemical formula for K and P
Answer:
Potassium phosphide (K3P)
Which two come together to form an ionic bond?
a. a positive cation and a ngetaive cation
b. a positive cation and a negative anion
c. a positive cation and a positive anion
d. a positive anion and a negative anion
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b. a positive cation and a negative anion
✏ Anions are negative in nature while cations are positive in nature. Together they come together by an attractive electrostatic force to form an ionic bond.
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[tex] \huge\blue{ \mid{ \underline{ \overline{ \tt ꧁❣ ʀᴀɪɴʙᴏᴡˢᵃˡᵗ2²2² ࿐ }} \mid}}[/tex]
This element has an oxidation number of -3 and it has 16 neutrons. What element is this room made of
Answer: Element is P, phosphor
Explanation: Phosphor has oxidation number -III and it has 15 protons. So it is possible to have 16 neutrons. Other elements having oxidation number -III are N and As which can not have an isotope with 16 neutrons.
An atom or ion has 16 protons, 15 neutrons, and 17 electrons. Is it positive, negative, or
neutral? Why? What element is it?
I really need help on this so can someone tell me the answer please!
If a material conducts heat easily, it is a good__________________. The answer has to be 18 letters long please type in the right answer please and tank you
Please answer if you know it I need this today this question is only for people who have done it or they know the answer. Please answer this I need to know the answer please and thank you have a good day! It would be amazing if I got an A+ on my final test! PLEASE HELP AND PLEASE ANSWER IF YOU KNOW THE ANSWER PLEASE HELP!!!!!!!!!!
AND DO NOT PUT IT ON NO FILE OR NOTHING PLEASE AND I MEAN IT PLEASE DON'T I CAN'T OPEN IT PLEASE DON'T PUT ANSWER ON FLIE PLEASE!!!!!!!!!!!!!!!
Answer:
Thermal Conductor
Explanation:
What is the relationship between temperature and volume?
Answer:
Charles's law states that the volume of a given amount of gas is directly proportional to its temperature on the kelvin scale when the pressure is held constant
The volume of a given gas sample is directly proportional to its absolute temperature at constant pressure (Charles's law). The volume of a given amount of gas is inversely proportional to its pressure when temperature is held constant (Boyle's law)
Explanation:
~Hope this helps
Sodium (Na) has an ionic charge of +1. Sodium forms an ionic bond with Chlorine (Cl) to form table salt. What charge must the chlorine ion have?
PLS ANSWER LEGITIMATLEY! THANKS! WILL MARK BRAINLIEST!
Explanation:
sodium has a positive charge and chlorine has a negative charge a negative and a positive charge you automatically for an ionic bond therefore the chlorine has to have a negative one charge
Cyclohexane (C6H12) is found in gasoline. It is burned for fuel in a combustion reaction. The unbalanced combustion reaction for octane is shown below. C6H12 + O2 + CO2 + H2O + heat When the reaction is balanced, how many carbon dioxide molecules are produced for every cyclohexane molecule burned? O A1 O B. 9 O c. 6 O D. 3
Answer:
6
Explanation:
C[tex]_6[/tex]H[tex]_{12}[/tex] + O[tex]_2[/tex] → CO[tex]_2[/tex] +H[tex]_2[/tex]O + heat can be balanced as C[tex]_6[/tex]H[tex]_{12}[/tex] + 6O[tex]_2[/tex] → 6CO[tex]_2[/tex] +6 H[tex]_2[/tex]O + heat. Therefore, the correct option is option C.
What is combustion reaction?
Combustion is a chemical reaction that often involves the presence of oxygen and produces light and heat within the form of flames. Because of the physical characteristics of the chemical process and the fact that more energy is produced than can be released through the surrounding medium, the rate or speed with which the substances that react combine is high. As a result, the ambient temperature about the reactants is increased, accelerating the reaction even further.
A lit match is a common illustration of a combustion reaction. A flame is produced when a match strikes something because friction warms the head of the match to a temperature where the chemicals respond by creating additional heat than can be released into the atmosphere. C[tex]_6[/tex]H[tex]_{12}[/tex] + O[tex]_2[/tex] → CO[tex]_2[/tex] +H[tex]_2[/tex]O + heat can be balanced as C[tex]_6[/tex]H[tex]_{12}[/tex] + 6O[tex]_2[/tex] → 6CO[tex]_2[/tex] +6 H[tex]_2[/tex]O + heat
Therefore, the correct option is option C.
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Calculate the molarity of a solution that contains 5 mol of Li2O in 2.35 L of solution.
Answer:
2.13 M
Explanation:
To solve this problem we need to keep in mind the definition of molarity:
Molarity = moles / litersAs the problem gives us both the number of moles and the volume of solution, we can proceed to calculate the molarity:
Molarity = 5 mol / 2.35 LMolarity = 2.13 MThe answer is 2.13 M.
A student is performing an acid-base extraction on unknown compounds, and she extracts the organic layer with 5% HCl solution and separates off the aqueous layer. She then adds sodium hydroxide solution to the aqueous layer and observes a white precipitate. Which of the following functional group(s) is most likely in the precipitated compound?
a. ether
b. amine
c. carboxylic acid
d. ester
Answer:
amine
Explanation:
We have to bear in mind that amines are basic compounds. This idea will be very important in attempting to answer this question.
So, when she adds 5% HCl solution in order to extract the organic layer, the amine forms a hydrochloride salt which is contained in the aqueous layer.
The addition of a base such as NaOH leads to the formation of a white precipitate of the amine.
A student made a sketch of a potential energy diagram to represent a reaction with a -^H
Explain, using complete sentences, why the diagram made by the student is correct or incorrect. Be sure to also explain
what the values of X and Y represent.
Answer: It’s correct because it’s showing an exothermic reaction. x is the reactants and y is the products.
Explanation: -ΔH means the reaction is exothermic and releasing heat. This lowers the potential energy.
Answer:
answer above is correct
Explanation:
What is the total energy (in Joules) required to raise the temperature
of 630 g of water from 20°C to 110°C?
ррррно да
Level 1
12
11
10
B
2
IA А
3
С C
8.
7.
1 D
# - tic
А д-
а.
Answer:
tic
Explanation:
because it is my answer okay
A solution has a [OH−] of 1 x 10^−11 M. What is the [H3O+] of the solution?
Explanation:
Ionic product of water, Kw
[tex]Kw = [OH {}^{ - } ][H _{3} O {}^{ + } ] \\ 1.0 \times {10}^{ - 14} = (1 \times {10}^{ - 11} )[H _{3} O {}^{ + } ] \\ [H _{3} O {}^{ + } ] = \frac{(1.0 \times {10}^{ - 14}) }{(1 \times 10 {}^{ - 11}) } \\ ][H _{3} O {}^{ + } ] = 0.001 \: M[/tex]
How many grams of potassium carbonate are needed to make 200 mL of a 2.5 M solution?
If I want to use 78 grams of isoproponol (C3H8O) in a reaction, how many mL do I need of a 3.4 M solution?
I have two solutions. In the first solution, 1.0 moles of sodium chloride is dissolved to make 1.0 liters of solution. In the second one, 1.0 moles of sodium chloride is added to 1.0 liters of water. Is the molarity of each solution the same? Explain your answer
Please help, thanks!
Answer:
The molecular formula for Potassium Carbonate is K2CO3. The SI base unit for amount of substance is the mole. 1 grams Potassium Carbonate is equal to 0.0072356020563581 mole. Note that rounding errors may occur, so always check the results.
Explanation:
The molecular formula for Potassium Carbonate is K2CO3. The SI base unit for amount of substance is the mole. 1 grams Potassium Carbonate is equal to 0.0072356020563581 mole.