How many grams of zinc do you need to dissolve in excess HCOOH to release 22.4 liters of hydrogen?

When zinc metal is dissolved in acid, hydrogen gas is released. In this case, regardless of which acid is used, 1 mol of hydrogen is released per 1 mol of dissolved zinc.

Let’s find the chemical amount of hydrogen. For this purpose, we divide the volume of gas by the volume of 1 mole of gas (22.4 liters).

N H2 = 22.4 / 22.4 = 1 mol;

Let’s calculate the weight of zinc. To do this, we multiply the amount of substance by the weight of 1 mole of metal.

m Zn = 1 x 65 = 65 grams;