Question

If 30.47 kilograms of hydrogen are produced, then how many kilograms of zinc have been consumed?

Answer 1

I assume this refers to your other question below.

mols H2 = grams/molar mass = ?
Using the coefficients in the balanced equation, convert mols H2 to mols Zn.
Now convert mols Zn to grams, then to kg. grams = mols Zn x atomic mass Zn = ?