In an experiment, 0.400 mol Fe and 0.750 mol HCl are combined. How many moles of hydrogen will form?

Question

____Fe + ____HCl ---> _____H2 + _____FeCl2

Answer 1

Fe + 2HCl ==> FeCl₂ + H₂

Limiting reactant is HCl because

0.4 mole Fe —> 0.4 mole H₂

0.75 mole HCl —> 0.375 mol H₂

So 0.375 moles H₂ will be formed