How many molecules are contained in 7 grams of hydrogen, solution.

univerkov | August 1, 2021 | education

The molar mass of a hydrogen molecule is 2 in a hydrogen molecule there are 2 atoms, hence the number of moles:
n = 7/2 = 3.5
Multiply the number of moles by the Avagadro number NA = 6.022 141 29 (27) 1023 mol − 1
and we get the number of molecules:
3.5 * 6.022 * 10 ^ 23 = 2.1077 * 10 ^ 24

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