Question

5.
The actual mass of a molecule of carbon dioxide is
M 7.3 × 10-23 g (2) 6.02 × 10-23 g
(3) 449
(4) 3.65 * 10-23 g​

Answer 1

Answer:

Option (1) 7.3 × 10^-23 g

Explanation:

Atomic Weight of CO₂ = 44.01 gm

i.e. in 44.01 gm of CO₂ (1 mole) no. of molecules = 6.022 × 10^23

Thus, the weight of 6.022 × 10^23 molecules = 44.01 gm

Therefore, the weight of 1 molecule = 44.01/(6.022 c) gm

                                                           = 7.3 × 10^-23 gm

Therefore, the correct option is option (1)

Hope this helps.