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## How many atoms of H are in one mole of H2O?

There are **two atoms H** and 1 atom O in 1 MOLECULE H2O (NOT MOLE); therefore, there are 3 x 6.02 x 10^23 = 18.06 x 10^23 or 1.806 x 10^24 atoms of H + atoms O in 1 mole H2O.

## How do you find the moles of h2 in H2O?

**Multiply the volume and pressure and divide the product by the temperature and the** molar gas constant to calculate moles of the hydrogen gas. In the example, the amount of hydrogen is 202,650 x 0.025 / 293.15 x 8.314472 = 2.078 moles.

## How much is a mole of hydrogen?

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 grams of hydrogen are in 2 moles water?

If we have one mole of water, then we know that it will have a mass of 2 grams (for 2 moles of H atoms) + 16 grams (for one mole O atom) = **18 grams**.

## What is the formula for moles to grams?

Moles to Grams Conversion Formula. In order to convert the moles of a substance to grams, you will need to **multiply the mole value of the substance by its molar mass**.