Question

Which among the following is the heaviest?

• A. One mole of oxygen
• B. One molecular of sulphur trioxide
• C. $100$ amu of uranium
• D. $44g$ of carbon dioxide

Answer 1

Answer: (D)

$44g$ of carbon dioxide

$1$ mole of oxygen $=1\times 16=16g$

$1$ molecule of ${SO}_3$ $(32+48)=80\times 6\times {10}^{-23}g$

$100$ amu of $U[92g=1mol]$

$=100\times 1.66\times {10}^{-24}g$

$44g$ of ${CO}_2=1mol=44g$

$\to$ Hence $44g$ of ${CO}_2$ is the heaviest among these.