Question

The molar mass of hydrogen (H₂) is 2.02 g/mol. A sample contains 4.00 mol of H₂. What is the mass, in grams, of this sample?

Answer 1

Answer : The mass of this sample is, 8.08 grams

Explanation : Given,

Molar mass of $H_2$ = 2.02 g/mol

Moles of $H_2$ = 4.00 mol

Formula used :

$\text{Mass of }H_2=\text{Moles of }H_2\times \text{Molar mass of }H_2$

Now put all the given values in this formula, we get the mass of this sample.

$\text{Mass of }H_2=4.00mol\times 2.02g/mol$

$\text{Mass of }H_2=8.08g$

Therefore, the mass of this sample is, 8.08 grams.