# How many moles of methane are in 7 31 10 to the 25th molecules?

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## How many moles of methane are in 7.31 10 to the 25th molecules?

121.43 moles CH4 are present.

## How many moles of hydrogen are in methane?

The formula for methane, CH4 indicates that one mole of the compound contains four moles of hydrogen atoms.

## How many moles are there in methane?

An amount of any substance in grams that is numerically equal to its atomic or molecular weight in amu has been defined as one mole of that substance. By this definition, one mole of hydrogen is 2.016 grams, one mole of methane is 16.043 grams, and one mole of water is 18.015 grams.

## How many molecules are in a mol?

Avogadro’s Number and the Mole. The mole is represented by Avogadro’s number, which is 6.022×1023 atoms or molecules per mol.

## How do you convert moles to molecules on a calculator?

To go from moles to molecules, multiply the number of moles by 6.02 x 1023. To go from molecules to moles, divide the numbers of molecules by 6.02 x 1023. In this online molecules to moles calculator, enter the values in molecules to get the number of moles.

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## How many water molecules are in 4 moles?

You would use avogadro’s number, 6.022×10^23 mol^-1 to convert moles to molecules. So, you would set up the dimensional analysis like so: 4.0 moles H2O *(6.022×10^23 units H2O/ 1 mole H2O) to get 2.4 x 10^24 molecules of water.

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## How many atoms are in 2 moles of methane?

One mole of methane specifies NA , Avogadro’s number of methane molecules, i.e. 6.022×1023 individual CH4 molecules. And thus it contains 4×6.022×1023 hydrogen atoms .

## Which has the highest number of molecules?

Hence, 8.0 mole of H2 contains the largest number of molecules.

## Why is the mole used to measure water but not marbles?

A mole is defined as the number of carbon atoms in exactly 12 g of pure carbon-12. Through years of experimentation, it has been established that a mole of anything contains 6.0221367 × 10 23 representative particles. … As you might imagine, Avogadro’s number would not be convenient for measuring a quantity of marbles.

## How many marbles are in one mole of marbles?

My high school chemistry textbook put it this way: If you had one mole of marbles— 6.02×1023 marbles, that is— and you spread them all over the entire surface of the Earth, you’d produce a layer that’s about three miles thick. I’ve read that they also call that number Avogadro’s constant.

## How many atoms are in a mole of sodium?

Then, multiply the number of moles of Na by the conversion factor 6.02214179×1023 atoms Na/ 1 mol Na, with 6.02214179×1023 atoms being the number of atoms in one mole of Na (Avogadro’s constant), which then allows the cancelation of moles, leaving the number of atoms of Na.

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## How is mol calculated?

1. First you must calculate the number of moles in this solution, by rearranging the equation. No. Moles (mol) = Molarity (M) x Volume (L) = 0.5 x 2. = 1 mol.
2. For NaCl, the molar mass is 58.44 g/mol. Now we can use the rearranged equation. Mass (g) = No. Moles (mol) x Molar Mass (g/mol) = 1 x 58.44. = 58.44 g.

## How many molecules are in 2 moles?

For example, since one atom of oxygen will combine with two atoms of hydrogen to create one molecule of water (H2O), one mole of oxygen (6.022 × 1023 of O atoms) will combine with two moles of hydrogen (2 × 6.022 × 1023 of H atoms) to make one mole of H2O.

## Is Avogadro’s number equal to one mole?

Avogadro’s number, number of units in one mole of any substance (defined as its molecular weight in grams), equal to 6.02214076 × 1023. The units may be electrons, atoms, ions, or molecules, depending on the nature of the substance and the character of the reaction (if any). 