Question

Calculate the formula/molecular mass of following

(i) Al₂(SO₄)₃
(ii) 24H₂O
(iii) C₂H₅OH
(iv) HNO₃
(v) CaCl₂
(vi) CaSO₄
(vii) 2H₂O

Answer 1

Refer to the period table. Use the atomic mass for calculation. Multiply the atomic mass with the number of atoms. For example, Al2(SO4)3. (27 × 2) + (32 x 3) + (16 x 12) = molecular mass