How many moles are in 3.5 x 10^24 molecules of methane gas?

Please show work, will give brainliest

Answers

Answer 1

Answer:

5.81 moles

Explanation:

To find the number of moles (n) in 3.5 x 10²⁴ molecules of methane gas, we divide the number of molecules by Avagadro's number (nA). That is,

n = number of molecules ÷ 6.02 × 10²³

According to this question, 3.5 x 10^24 molecules of methane gas was given, hence,

n = 3.5 × 10²⁴ ÷ 6.02 × 10²³

n = 3.5/6.02 × 10(24 - 23)

n = 0.5814 × 10¹

n = 5.81 moles


Related Questions

calculate the mass in 4.05*10^22 molecules of calcium phosphate

Answers

Answer:

m = 20.9 g.

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to solve this problem by recalling both the Avogadro's number for the calculation of the moles in the given molecules of calcium phosphate and the molar mass of this compound in order to secondly calculate the mass as shown on the following setup:

[tex]m=4.05x10^{22}molecules*\frac{1mol}{6.022x10^{23}}*\frac{310.18g}{1mol}\\\\m=20.9g[/tex]

Regards!

H2C=CH2 + H2 решение?​

Answers

Answer:

[tex]CH _{3}CH _{3}[/tex]

Ethane

Use the periodic table to identify the noble gas that would be included in the noble-gas notation for each of the following elements.

Answers

Answer:

Explanation:

Use the periodic table to identify the noble gas that would be included in the noble-gas notation for each of the following elements.

Si:

Fr:

Hg:

V:

Answer:

Si: Ne

Fr: Rn

Hg: Xe

V: Ar

Explanation: trust me bro

Rank the species below in order of decreasing leaving group capabilities in SN2 reactions (best leaving group to worst).
A. H2N-
B. CH3O-
C. C6H5SO3-
D. H2O
1. Best
2. Worst

Answers

Answer:

H2O> C6H5SO3- > CH3O- > H2N-

Explanation:

SN2 reaction is a reaction in which there is a synchronous departure of the leaving group and attachment of the incoming nucleophile in the transition state. Hence, an SN2 reaction passes through a single transition state. It is a bimolecular reaction.

A good leaving groups must be stable on its own. Usually, weak bases and neutral species are good leaving groups.

The order decreasing leaving group capabilities in SN2 reactions for the species listed in the question is;

H2O>C6H5SO3-> CH3O-> H2N-

Hence H2O is the best leaving group while H2N- is the worst leaving group.

The ranking from the best-leaving group to worst leaving group in SN2 reactions would be D. H₂O (water), C. C6H5SO3- (phenylsulfonate), B. CH₃O- (methoxide), A. H₂N- (amide).

In SN₂ reactions, leaving group capabilities are determined by the ability of the group to accept electrons and leave the molecule. The better the leaving group, the easier it is for it to leave the molecule. Based on this,

Water is a weak base and a good leaving group in SN2 reactions.

Phenylsulfonate is also a good leaving group, but it is slightly weaker than water.

Methoxide is a weaker base and leaving group compared to water and phenylsulfonate.

Amide is the weakest base and leaving group among the provided species.

To learn more about the SN₂ reactions, follow the link:

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HELP PLEASE HURRY!!!
You have 12.51 grams of C2H6, how many moles do you have?

Answers

Answer:

How many grams C2H6 in 1 mol? The answer is 30.06904. We assume you are converting between grams C2H6 and mole. You can view more details on each measurement unit

Calculate the number of moles

309 grams of (SF)4 = how many moles of (SF)4

Answers

Answer:

2.85 mol

Explanation:

Step 1: Given data

Mass of sulfur tetrafluoride (SF₄): 309 g

Step 2: Calculate the number of moles corresponding to 309 g of sulfur tetrafluoride

To convert mass to moles we need a conversion factor: the molar mass. The molar mass of SF₄ is 108.07 g/mol.

309 g × 1 mol/108.07 g = 2.85 mol

Sodium reacts vigorously with water while potassium, the next element down in Group I, has a faster reaction rate. What would you expect of the rate of reaction of elements further down in Group I when exposed to water?
a. They would react with the same rate as potassium.
b. They would react much faster than sodium or potasssium.
c. They would react more slowly than potassium.
d. The rate of reaction would be unpredictable

Answers

Answer:

c. They would react more slowly than potassium. It's because sodium reacts slowly with water!

Explanation:

i am giving you the answer according to the doubtnut channel!

c. They would react more slowly than potassium.

Because their ability to displace hydrogen will be less.

*
The crystal structure of salt is

Answers

quimica espero que si sea corecta

A sample of Kr gas is observed to effuse through a porous barrier in 3.79 minutes. Under the same conditions, the same number of moles of an unknown gas requires 2.66 minutes to effuse through the same barrier. The molar mass of the unknown gas is________ g/mol.

Answers

Answer:

[tex]M'=41.3g/mol[/tex]

Explanation:

From the question we are told that:

Time Through first barrier [tex]T_1=3.79min[/tex]

Time Through second barrier [tex]T_2=2.66min[/tex]

Generally the Grahams Law equation for   time of diffusion is mathematically given by

 [tex]T=K\sqrt{M}[/tex]

Where

M=Mass Number of Kr

 [tex]M=83.8[/tex]

Therefore

 [tex]{T}{\sqrt{M}={T}{\sqrt{M'}[/tex]

 [tex]{3.79}{\sqrt{83.8}={2.66}{\sqrt{M'}[/tex]

 [tex]M'=0.645[/tex]

 [tex]M'=41.3g/mol[/tex]

True or false? All producers are at the top of the food web

Answers

Answer:

false all producers are at the top of food web

PLEASE is possible to calculate the theoretical yield without a balanced equation?

Answers

No, you absolutely need a balanced equation because you need the coefficients to figure out the molar ratios plus you need the amount of one reactant or product to determine the theoretical yield.

No, it's not possible to calculate the theoretical yield  without a balanced equation.

What is the theoretical yield?

Theoretical yield is the yield that is calculated by the complete reaction of the limiting reagent. This is called expected or calculated amount of product.

[tex]\rm percent\; yield = \dfrac{(actual\; yield)}{(theoretical\; yield)} \times 100\\\\[/tex]

Thus, No, it's not possible to calculate the theoretical yield  without a balanced equation.

Learn more about theoretical yield

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The table shows the recipe and the available ingredients for making the maximum possible number of sandwiches.



Making Sandwiches

Recipe for One Sandwich:
2 cheese slices, 1 ham slice, 2 bread slices

Ingredients Available:
12 cheese slices, 10 ham slices, 12 bread slices

If the ingredients represent reactants of a chemical reaction, which of the following represents the leftover reactant?

A. 2 ham slices

B. 4 ham slices

C. 2 cheese slices

D. 4 cheese slices

Answers

Answer:

B. 4 ham slices

Explanation:

A chemical reaction involves one or more substances known as reactants combining chemically to give one or more substances known as products.

Reactants in chemical reactions combine in definite mole or mass ratios to give products. Therefore, when one substance is present in excess of what is required to combine with another to form products, that substance is known as the excess reagent. The other substance which is present in a smaller amount and which when used up, the reaction stops is known as the limiting reagent.

From the illustration of the sandwiches in the question, the recipe for one sandwich represents the chemical equation of a reaction. The equation form is given below:

2 cheese slices + 1 ham slice + 2 bread slices ---> 1 sandwich

The ratio of the reactant is 2 : 1 : 2

From the available ingredients, 12 cheese slices, 10 ham slices, 12 bread slices.

12 cheese slices will require 6 ham slices and 12 bread slices to produce 6 sandwiches.

However, since there are 10 ham slices, 4 ham slices will be left over unused. This is the excess or leftover reactant.

Answer:

B. 4 ham slices

Explanation:

Got it right on the test

If 4.00 moles of O2 occupies a volume of 5.0 L at a particular temperature and pressure, what volume will 3.00 moles of oxygen gas occupy under the same condition?

Answers

Answer: Volume occupied by 3.00 moles of oxygen gas under the same condition is 3.75 L.

Explanation:

Given: [tex]n_{1}[/tex] = 4.00 moles,          [tex]V_{1}[/tex] = 5.0 L

[tex]n_{2}[/tex] = 3.00 moles,                 [tex]V_{2}[/tex] = ?

Formula used is as follows.

[tex]\frac{V_{1}}{n_{1}} = \frac{V_{2}}{n_{2}}[/tex]

Substitute the values into above formula as follows.

[tex]\frac{V_{1}}{n_{1}} = \frac{V_{2}}{n_{2}}\\\frac{5.0 L}{4.00 mol} = \frac{V_{2}}{3.00 mol}\\V_{2} = 3.75 L[/tex]

Thus, we can conclude that volume occupied by 3.00 moles of oxygen gas under the same condition is 3.75 L.

What are the laws and calculations governing gas behavior?

Answers

Answer:

Laws governing gas behavior.

Explanation:

Boyle's law:

It relates the pressure and volume of an ideal gas at a constant temperature.

According to this law:

"The volume of a fixed amount of gas at constant temperature is inversely proportional to its pressure".

[tex]P \alpha V[/tex].

Charle's law:

It relates the volume and absolute temperature of an ideal gas at a constant pressure.

According to this law:

"The volume of a fixed amount of gas at constant pressure is directly proportional to its absolute temperature".

[tex]V \alpha T[/tex].

Avogadro's law:

According to this law:

equal volumes of all gases under the same conditions of temperature and pressure contain, an equal number of moles.

[tex]V \alpha n[/tex].

Ideal gas equation:

By combining all the above-stated gas laws, this equation is formed as shown below:

[tex]V \alpha \frac{nT}{P} \\=> V= R. nT/ P\\=>PV=nRT[/tex]

R is called universal gas constant.

It has a value of 0.0821L.atm.mol-1.K-1.

Answer:

Boyle's law, Charle's law,  Guy Lussac's law and Avogadro's law

Explanation:

All the gases behaves similarly when the environment conditions are normal. But when the physical condition changes like when the pressure, volume or temperature changes, the gas behaves differently and shows a deviation.

The number of gas laws are :

Boyle's Law

Boyle's law states that when the temperature remaining constant, the pressure of the gas varies inversely to the volume of the gas.

i.e.   [tex]P \propto \frac{1}{V}[/tex]

Charle' law

Charle's law states that when pressure is constant, the temperature of a gas is directly proportional to the volume.

i.e. , [tex]$T \propto V$[/tex]

Gay Lussac's law

Gay - Lussa law states the volume and the mass of the pressure of the gas is directly proportional to the  temperature of the gas.

i.e. P.T = constant

Avogadro's law

It states that under the conditions of same pressure as well as temperatures, the gases having equal volumes will have same numbers of molecules.

i.e. [tex]\frac{V_1}{n_1}=\frac{V_2}{n_2}[/tex] = constant

which of these molecules is nonpolar?

Answers

Answer:

option b is your right answer

True or False
Helium belongs to Noble Metals

Answers

Answer:

This answer is "True"

the answer would be *true*

Refer to your completed Table 1d of the recitation guide of ionic compound naming rules to determine whether this statement is true or false. A Roman numeral in a compound name tells you how many of that ion appear in the formula. Select one: True False

Answers

Answer:

False

Explanation:

Roman numerals are seen in the names of several compounds. They often appear immediately after the name of central atom in the molecule.

These Roman numerals are used to depict the oxidation state of the central atom in the molecule and not to show how many of that ion appear in the formula.

For instance, in carbon IV oxide, the Roman numeral IV shows that the central atom in the compound-carbon is in the +4 oxidation state.

For the reaction...
N2 + O2 <=> 2NO: AH = +182 kJ mol-1.
If the temperature is increased the equilibrium position will shift
Your answer:
a) to the left
b) to the right
c) to the left and right
d) neither left nor
right

Answers

Answer:

B

Explanation:

AH is positive so the forward reaction is endothermic. Thus, increasing temperature would cause equilibrium to shift to the right as endothermic reaction favors higher temperature. This increases the yield of NO.

Answer: B

Explanation:

What is the pH of 0.6 M NaOH?

Answers

Answer:

pOH = - log[OH-]

[OH-] = 0.6M

[tex]pOH \: = - log(0.6) \\ = 0.2218487496 \\ pH \: + pOH \: = 14 \\ pH \: + 0.221848749 = 14 \\ pH = 14 - 0.221848749 \\ = 13.77815125 \\ 13.8[/tex]

The citric acid cycle has a catabolic role, oxidizing acetate into CO2 and generating energy, and an anabolic role.

a. True
b. False

Answers

This is False i believe…

When using vacuum filtration to separate a dissolved solid from an undissolved solid, what techniques should you use to ensure a quantitative separation

Answers

Answer: See explanation

Explanation:

Vacuum filtration is referred to as a fast filtration technique that is used in the separation of solids from liquids. It is also used to collect a desired solid. It basically uses a side-arm flask and a Buchner funnel.

Based on the question, the techniques that should be used to ensure a quantitative separation goes thus:

• Wet the filter paper before the mixture is poured into the filter funnel.

• Then, carefully rinse the flask with a little amount of water into the filter funnel.

• After that, the solid on the filter paper should be washed the with a small amount of water.

• Finally, Dry the solid on the filter paper when the separation is done.

After the student closes the cooler, there NOT any inputs or outputs from this system because ________. a. no energy is being transferred into or out of the cooler b. there is no flow of energy across the system boundary c. there is no matter flowing into or out of the system d. all of the above

Answers

Answer:

d. All of the above

Explanation:

d. All of the above

Which of the following natural hazards occur for a long period of time?
tornado
earthquake
drought
thunderstorm

Answers

Answer:

drought

Explanation:

droughts are long periods without water

describe how you would test your indicator to check that it works​

Answers

Answer:

If the colour of the indicator changes blue when a base is there and when it changes to red or pink or scarlet when it is acid. Then we can say that the indicator is working

all first level consumers are carnivore: True or false?

Answers

False, because there is a producer and another level eats the produce which is the first level ( the primary consumer) which they are not carnivore they are herbivores ( which mean they eat plant only) for carnivores ( you eat meat only) hope this helps :)
The answer is true to the question

Who was the first person to suggest the existence of atoms?

Answers

Answer:

Democritus first introduced the idea of the atom almost 2500 years ago.

Answer:

B. Democritus

Explanation:

Energy is just like water, cycles through ecosystems.

True or false?

Answers

Answer:

true

Explanation:

I think

What the correct answer

Answers

Answer:

[Ar] 4s²3d³

Explanation:

Vanadium has atomic number of 23. The electronic configuration of vanadium can be written as:

V (23) => 1s² 2s²2p⁶ 3s²3p⁶ 4s²3d³

NOTE: After the 18th electron, 4s will be filled before 3d.

We can also write the electronic configuration of an element in its condensed form by writing the symbol of the noble before the desired element in a squared bracket followed by the remaining electrons to complete the electronic configuration of the element.

The electronic configuration of vanadium in its condensed form is given below:

The noble gas before vanadium is Argon (Ar) with atomic number of 18. Thus, the electronic configuration of vanadium becomes:

V (23) => [Ar] 4s²3d³

Which aqueous solution has the highest vapor pressure at 25ºC? 15.0g of sucrose (C12H22O11) in 100.0mL of water

Answers

The question is incomplete, the complete question is;

Which aqueous solution has the highest vapor pressure at 25ºC?

15.0g of glucose (C6H12O6) in 100.0mL of water

25.0g of glucose (C6H12O6) in 100.0mL of water

15.0g of sucrose (C12H22O11) in 100.0mL of water

25.0g of sucrose (C12H22O11) in 100.0mL of water

Answer:

15.0g of sucrose (C12H22O11) in 100.0mL of water

Explanation:

The vapor pressure of a substance is a colligative property. Colligative properties are the properties of a substance that depend on the amount of solute present.

Since vapour pressure is a colligative property, we have to look out for the solution that has the lowest number of moles because as more solute is dissolved in the solvent, the vapor pressure of the solvent decreases.

Hence, 15.0g of sucrose (C12H22O11) in 100.0mL of water has the lowest number of moles in solution thus it is expected to exhibit the highest vapour pressure.

heating curve shows temperature verses energy gain. Which parts of the curve represent a gain in potential energy?
100
Temperature (°C)
0
Increasing Energy

Answers

Answer:

Those two horizontal lines.

Explanation:

Hello there!

In this case, when focusing on these heating curves, it is important to say they tend to have two constant-temperature sections and three variable-temperature sections. Thus, from lower to higher temperature, the first constant-temperature section corresponds to melting and the second one vaporization, whereas the three variable-temperature sections correspond to the heating of the solid until melting, the liquid until vaporization and the gas until the critical point.

In such a way, we infer that the boxes referred to constant temperature are referred to a gain in potential energy, that is, the two horizontal lines.

Regards!

Answer: My sacrifica has been made.

Explanation:

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