Question

What is the number of carbon atoms present in 22 gram carbon dioxide?

Answer 1

Step 1:

Number of carbon atoms = massmolarmass×N_A×atomicity

N_A=Avogadro′snumber=6.022×10²³

Atomicity of CO₂ = 3 atoms ( 1 C atom + 2 O atoms)

Step 2:

Number of carbon atoms in 22 g CO₂=2244×6.022×10²³×3

=0.5×6.022×10²³×3

=1.5×6.022×10²³

=1.5×N_A CO₂ is9.033×10²³

Hence, the number of carbon atoms in 22 g