Question

How many moles of ${CO}_2$ are in 1.53 g ${CO}_2$?

• A. $1.807\times {10}^{-24}$
• B. $3.476\times {10}^{-2}$
• C. $1.717\times {10}^{-2}$
• D. $1.204\times {10}^{24}$
• E. $2.414\times {10}^{-1}$

Answer 1

The correct option is B $3.476\times {10}^{-2}$

The molecular weight of $C{O}_2$ is 44 g/mol.
Number of moles of $C{O}_2=\frac{\text{Mass}}{\text{Molecular weight}}=\frac{1.53\text{g}}{44\text{g/mol}}=3.476\times {10}^{-2}$ moles .