Question

The number of gram atoms in $3.2\text{g}$ of $Ca$ :

• A. $3.2\text{g}$ atoms
• B. $0.08\text{g}$ atoms
• C. $0.8\text{g}$ atoms
• D. $1.0\text{g}$ atoms

Answer 1

The correct option is B $0.08\text{g}$ atoms

$\text{Number of gram atoms}=\frac{\text{given mass}}{\text{molar mass}}=\frac{3.2}{40}=0.08\text{g atoms}$