Answer:
3.232 g
Step-by-step explanation:
1. Convert moles to grams (multiply by molar mass)
molar mass of hydrogen = 1.01 g/mol
0.64 mol x 1.01 g/mol = 0.6464 g of H
2. Multiply by amount of Hydrogen in compound
There's 5 Hydrogen in the compound
0.6464g x 5 = 3.232 g