Question

3 molecules of CO, weighs
a) 33 x 10^-23g
b) 11 x 10^-23g

c) 44 x 10^-23g
d) 22 x 10^-23g​

Answer 1

Answer:

Correction in the question : 3 molecules of CO2, weighs?

Solution

Number of moles = Given mass / Molar Mass = Number of molecules / NA( Avagadro number)

Mass = 3 × 44 / 6.02 × 10^23

Mass = 21.9 × 10^(-23)

Mass = 22 × 10^(-23)

Option (d) is the correct answer.