Question

Calculat the number of moles in 4.7x10 power 23 molecule of oxygen

Answer 1

Solution :-

Given ,

• Number of molecules of oxygen = 4.7 × 10²³

We need to find ,

• Number of moles in the given molecules of oxygen

As we know that ,

1 mole of Oxygen molecule ( O₂ ) = 6.023 × 10²³ molecules , ions or particles .

Let , no. of moles for 4.7 × 10²³ molecules be ‘x’

Now , for finding ‘x’ using proportion

• 1 : x : : 6.023 × 10²³ : 4.7 × 10²³

By means and extremes,

⇒ x ( 6.023 × 10²³ ) = 4.7 × 10²³ × 1

⇒ x = [ 4.7 × 10²³ ]/[ 6.023 × 10²³ ]

⇒ x = 4.7/6.023

⇒ x = 0.78

Hence , number of moles in 4.7 × 10²³ of molecules of Oxygen = 0.78