Question

Calculate the number of moles for $3.011\times {10}^{23}$ He atoms.

• A. 1 mol
• B. 2 mol
• C. 1.5 mol
• D. 0.5 mol

Answer 1

The correct option is D 0.5 mol

$\text{No. of moles}=\frac{N}{N_A}$
$=\frac{3.011\times {10}^{23}}{6.022\times {10}^{23}}$
$=\frac{1}{2}=0.5mol$