Question

The molecular formula of certain compound is M4O6. If 18.88g of the compound contains 10 g of M, the atomic mass of M is approximately
(a) 40g (b) 54g (c) 27g (d) 12g

Answer 1

Answer:

18.88g of the compound M4O6

contains 10g M

18.88g M4O6

contains 8.88g O

Thus,

According to above two expression ratio of M with O will be given as

4M : 6 O = 10.0 : 8.88

Molar mass of the 6 O a = 96 g/mol

Thus, mass of 4 M can be determined

4 M / 96 = 10.0/8.88

4 M = (96 × 10)/8.88

4 M = 108

M = 27

Atomic mass of M = 27 u