Question

Calculate the number of molecules present in 22g of co2

Answer 1

Given :

Mass of CO₂ = 22 g

To Find :

The number of molecules present in 22 g of CO₂

Solution :

1 mole of any gaseous substance contains 6.022×10²³ molecules.

We know, 44 gm of CO₂ = 1 mole

So, 44 gm of CO₂ contains 6.022×10²³ molecules.

We are required to find the number of molecules present in 22 g of CO₂

44 gm of CO₂ contains 6.022×10²³ molecules

1 gm of CO₂ will contain $\frac{6.022 * 10^2^3}{44}$ molecules

22 gm of CO₂ will contain $\frac{6.022 * 10^2^3}{44}$ × 22 molecules

                                        = 3.011 × 10²³ molecules.

Therefore, 3.011 × 10²³ molecules are present in 22 g of CO₂

Answer 2

Answer:

3.011 × 10²³ molecules are present in 22 g of CO₂

Explanation:

Given : Mass of CO₂ = 22 g

To Find : The number of molecules present in 22 g of CO₂

Solution :

we know that,

1 mole of any gaseous substance contains 6.022×10²³ molecules.

1 mole of CO₂= (1 x atomic mass of C )+( 2 x atomic mass of O)

                       = (1 x 12) + (2 x 16) = 12 + 32

                       = 44 gm

So, 44 gm of CO₂ contains 6.022×10²³ molecules.

The number of molecules present in 1 g of CO₂ = (6.022×10²³) / 44

                                                                                  =0.1368 ×10²³

Therefore,

22 gm of CO₂ will contain

= Number of molecules present in 1 g of CO₂  × 22

= 0.1368 ×10²³ x 22

= 3.011 × 10²³ molecules.

Therefore, 3.011 × 10²³ molecules are present in 22 g of CO₂