A certain compound was found to have a molar mass of 74.122 g.?

Question

A 3.122 g sample of this compound was burned in pure oxygen gas. The measured amount of CO2 produced was 7.415 g, while that of H2O was 3.794 g. No other products were produced in the reaction.

How many moles of hydrogen were in the original sample that underwent combustion ?

Answer 1

(3.794/18) x 2 moles of H atoms