Calculate the molar mass of the following substances :
(a) Ethyne, `CH_(2)`
(b) Sulphur molecule, `S_(8)`
(c) Phosphorus molecule, `C_(4)` (atomic mass of Phosphorus = 31)
(d) Nitric acid, `HNO_(3)`
Hydrochloric acid, HCl

Explanation

Ethyne, CH Molar mass of ethyne, `C_(2)H_(2) = 2x12+2x1`
`=26g`
(b) Sulphur molecule `S_(8)`
Molar mass of Sulphur molecule,
`S_(8)=8x32=256g`
(c) Phosphorus molecule `P_(4)`
`P_(4)=4x31`
`=124g`
(d) Hydrochloric acid, HCl (e) Nitric acid, `HNO_(3)`
Molar mass of Nitric acid `HNO_(3)+1+14+3x16=63g`