1.

Calculate the molar mass of the following substances : (a) Ethyne, C_(2)H_(2) (b) Sulphur molecule, S_(8) (c) Phosphorus molecule, P_(4) (Atomic mass of phosphorus = 31) (d) Hydrochloric acid, HCl (e) Nitric acid, HNO_(3).

Answer»

<P>

Solution :The molar mass (Unit, 9) of the following SUBSTANCES are -
(a) Ethyne, `C_(2)H_(2) = (2 xx 12) + (2 xx 1)`
= 24 +2 = 26 g
(b) Sulphur molecule, `S_(8) = 8 xx 32 = 256 g`
(c) Phosphorus molecule, `P_(4) = 4 xx 31 = 124 g`
(d) HYDROCHLORIC acid, HCl = `(1 xx 1) + (1 xx 35.5)` = 1 + 35.5 = 36.5 g
(e) Nitric acid, `HNO_(3) = (1 xx 1) + (1 xx 14) + (3 xx 16)`
= 1 + 14 + 48 = 63 g


Discussion

No Comment Found

Related InterviewSolutions