Answer:
160.32 g of Ca
Explanation:
The reaction is this:
Ca + 2HCl → CaCl₂ + H₂
Mass of produced H₂: 8 g
If we convert the mass to moles → 8 g . 1mol/2g = 4 mol
So ratio is 1:1. Therefore 4 moles of H₂ were produced by 4 moles of Ca.
Let's convert the moles to mass → 4 mol . 40.08 g/1mol = 160.32 g
