question_answer

  Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. (a) Ammonia                      (b) Carbon dioxide (c) Hydrogen chloride    (d)Aluminium fluoride (e) Magnesium sulphide

Answer:

                      (a) (ammonia) Ratio of N and H = 14 : 3 (b)  (carbon dioxide)                            Ratio of C and O = 12 : 32 = 3 : 8                 (c) HCl (hydrogen chloride or hydrochloric acid) Ratio of H and Cl= 1:35.5                       (d) (aluminium fluoride)                       Ratio of Al and F =27: 57 =9: 19                (e) MgS (magnesium sulphide)                     Ratio of Mg and S = 24 : 32 = 3 : 4