Question

calculate the molar mass of the following a. ethylene, c2 h2 b. s8 c. p4 d. HNO3​

Answer 1

Explanation:

(a) Ethyne (C

2

H

2

) = 2×Mass of C atom+2×Mass of H atom=2×12+2×1=24+2=26 g/mol

(b) Sulphur dioxide (S

8

)=8×Mass of sulphur atom=8×32=256 g/mol

(c) P

4

=4×Mass of P atom=4×31=124 g/mol

(d) HCl=1×Mass of H atom+1×Mass of Cl atom=1+35.5=36.5 g/mol

(e) HNO

3

=1×Mass of H atom+1×Mass of N atom+3×Mass of O atom

=1×1+1×14+3×16=63 g/mol