Calculate the mass of zinc required to obtain 10 liters of hydrogen by reacting it with an acid.

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 determine the molar amount of hydrogen. To do this, we divide the volume of gas by the volume of 1 mole of gas (which is 22.4 liters).

N H2 = 10 / 22.4 = 0.446 mol;

To obtain such an amount of hydrogen, it is necessary to dissolve 0.446 mol of zinc.

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

m Zn = 0.446 x 65 = 28.99 grams;