Calculate the mass in grams of 0.17 mole of hydrogen sulphide, H2S.
(Atomic masses: H = 1 u, S = 32 u)
For converting mole into mass in grams and vice-versa, we always need a relationship between mass and mole.
Molar mass of hydrogen sulphide, H2S = 1×2+32 g /mol = 34g/mol
Therefore, number of grams of hydrogen sulphide, H2S in 0.17 mol of it = 0.17 mol of oxygen × 34 g /mol = 5.78 g of hydrogen sulphide, H2S.