Calculate the formula mass of each compound h2s2

The formula mass is calculated by adding up all the atomic masses for every atom in the formula. First, we need to know the atomic masses of the atoms involved.

H = 1.01 amu

S = 32.06 amu

Formula mass = 2 x 1.01 amu + 2 x 32.06 amu = 66.14 formula mass unit