Question

How many moles of H₂0 will be required to make 19.2 moles of O₂?

Answer 1

As shown in the picture above,

according to the Stoichiometry ,

$\dfrac{n_{H_{2}O}}{n_{O_{2}}} = \dfrac{x}{19.2} = \dfrac{2}{1} \\ \\ x = 38 . 4 mol$