Question

How many molecules in 5.68 g of ozone (O3)

Answer 1

`\boxed{\sf no.\ of \ molecules = 7.13 * 10^(22) \ molecules}`

Step-by-step explanation:

Given data::

Mass in g = m = 5.68 g

Molar mass = M = (16)3 = 48 g/mol

Avogadro's number =
`N_A` = 6.023 × 10²³

Required:

No. of molecules = ?

Formula:

`\displaystyle no.\ of \ molecules = (m)/(M) * N_A`

Solution:

Put the givens in the above formula

`\displaystyle no. \ of \ molecules =(5.68)/(48) * 6.023 * 10^(23)\\\\no. \ of\ molecules = 0.12 * 6.023 * 10^(23)\\\\no. \ of \ molecules = 0.713* 10^(23)\\\\no.\ of \ molecules = 7.13 * 10^(22) \ molecules\\\\\rule[225]{225}{2}`