Question

A sample of $PC{l}_3$ contains 1.4 mole of the substance. How many atoms arc there in the sample?

• A. $4$
• B. $5.6$
• C. $2.409\times {10}^{24}$
• D. $3.372\times {10}^{24}$
• E. $8.431\times {10}^{23}$

Answer 1

The correct option is D $3.372\times {10}^{24}$

1 Molecule of PCl${}_3$ contains 4 atoms

no. of atoms = 4 $\times$ (moles of $PC{l}_3$) $\times$ 6.02 $\times$ 10${}^{23}$

=4 $\times$ 1.4 $\times$ 6.02 $\times {10}^{23}$

=3.372 $\times {10}^{24}$