Question

Calculate the no of molecules present in 44g of CO2 [ at mass c= 12

Answer 1

First we get and calculate the atomic weight of carbon and oxygen
Carbon = 12 and oxygen=16
CO2=12+(16×2)
=12+32
=44u
44gm of CO2 has 6.2×10^23 molecules (Avogadro's number)

Therefore, 44g=(44×6.2×10^23)/44
=6.2×10^23 molecules

Answer 2

Answer: $6.023\times 10^{23}$ of $CO_2$ molecules

Explanation: According to avogadro's law, 1 mole of every substance contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}$

Given mass of $CO_2$ = 44 g

Molar mass of $CO_2$ = 12+32= 44 g/mol

$\text{Number of moles}=\frac{44g}{44g/mol}=1mole$

Now 1 mole of $CO_2$ molecule contains = $6.023\times 10^{23}$ of molecules