Question

Calculate the number of moles of $C{O}_2$ presents in a sample containing $1.2044\times {10}^{24}$ molecules of $C{O}_2$.

• A. 1
• B. 2
• C. 3
• D. $2N_A$

Answer 1

The correct option is B 2

$Numberofmoles=\frac{Numberofmolecules}{Avogadronumber}$
$=\frac{1.2044\times {10}^{24}molecules}{6.022\times {10}^{23}molecules/mol}$
$=2moles$