Question

$1.4$ moles of phosphorus trichloride are present in a sample. How many atoms are there in the sample?

• A. $5.6$
• B. 34
• C. $2.4 \times 10^{23}$
• D. $3.372 \times 10^{24}$

Answer 1

Answer: (D)

$3.372 \times 10^{24}$

Answer 2

(4) : No. of atoms in 1 mole of $PCl_{3} = 4$

No. of aotms in $1.4$moles of $PCl_{3}$

$= 4 \times 1.4 \times 6.022 \times 10^{23} = 3.372 \times 10^{24}$