Question

The number of molecules in 16 g of methane is
(a) 3.0 × 10²³ (b) 16/6.02 × 10²³
(c) 6.023 × 10²³ (d) 16/3.0 × 10²³

Answer 1

Answer:

c)6.023×10²³

Explanation:

c)6.023×10²³

Answer 2

Number of molecules for given gas are - (c) 6.023 × 10²³

One mole of any molecule is known to contain number of molecules equivalent to Avogadro's number.

Avogadro's number is 6.023 × 10²³.

In the given question - weight of methane is 16 gram.

Molecular weight of methane is 16.

Number of moles will be given by the formula - weight/molecular weight.

Number of moles = 16/16 = 1.

Hence, number of molecules will be - 1*6.023 × 10²³

Hence, number of molecules = 6.023 × 10²³.