Calculate the number of molecules in 88 g of this gas sample. [Given, atomic masses of C = 12 u, O = 16 u, N A = 6.022 × 10 23 per mole]

Question

Philoid · Accepted Answer

Given: Mass of CO₂ = 88g

To calculate the number of molecules, first we apply the formula:

Number of gram molecules

⇒ Number of gram molecules

⇒ Number of gram molecules = 2

Now, number of molecules = 2 × Avogadro’s number

= 2 × 6.022 × 10²³

= 1.2 × 10²⁴

Thus, number of molecules of CO₂ is 1.2 × 10²⁴