How to find the mass of hydrogen sulfide H2S with a chemical amount of 3 mol?

n (H2S) = 3 mol.

Let’s determine the mass of hydrogen sulfide. For this we use the following formula. We write down the solution.

n = m / M.

Where n is the amount of substance.

m is the mass of the substance.

M is the molar mass of the substance.

First, we find the molar mass of hydrogen sulfide. We write down the solution.

M (H2S) = 1 * 2 + 32 = 34 g / mol.

m (H2S) = n * M = 3 mol * 34 g / mol = 102 g.

This means that the mass of 3 mol of hydrogen sulfide is 102 grams.

Answer: m (H2S) = 102 g.