Question

find which has more molecules: 4 grams of CH4 or 4 grams of O2​

Answer 1

Answer:

Methane (CH₄)

Explanation:

Oxygen

W = 4

M = 32

so, n = W/M = 4/32 = 1/8 mol

1 mol has 6.022 x 10^23 molecules.

So, 1/8 mol will have 6.022/8 x 10^23 = 7.5275 x 10^22 molecules

Methane

W = 4

M = 16

so, n = W/M = 4/16 = 1/4 mol

1 mol has 6.022 x 10^23 molecules.

So, 1/4 mol will have 6.022/4 x 10^23 = 1.5055 x 10^23 molecules

Clearly, 1.5055 x 10^23 > 7.5275 x 10^22

Hence, Methane will have more molecules.