How many grams of zinc and sulfuric acid do you need to take to get 4 moles of hydrogen?

1. Zn + H2SO4 = ZnSO4 + H2 ↑;

2. find the mass of the required zinc:

n (Zn) = n (H2) = 4 mol;

m (Zn) = n (Zn) * M (Zn) = 4 * 65 = 260 g;

3. Let us find how many grams of sulfuric acid is required to release the specified amount of hydrogen:

n (H2SO4) = n (H2) = 4 mol;

m (H2SO4) = n (H2SO4) * M (H2SO4);

M (H2SO4) = 2 + 32 + 4 * 16 = 98 g / mol;

m (H2SO4) = 4 * 98 = 392 g.

Answer: 260 g Zn, 392 g H2SO4.