A sample of phosphorus trichloride (PCl3) contains 1.4 moles of the substance. How many atoms are there in the sample ?

Question

A sample of phosphorus trichloride (PCl3) contains 1.4 moles of the substance. How many atoms are there in the sample ? (A) 4 (B) 5.6 (C) 8.431 × 1023 (D) 3.372 × 1024

Tardigrade Admin · Accepted Answer

No. of atoms in 1 mole of PCl3 = 4 No. of atoms in 1.4 moles of PCl3 = 4 × 1.4 × 6.022 × 1023 = 3.372 × 1024

Q. A sample of phosphorus trichloride $(PC l_{3})$ contains 1.4 moles of the substance. How many atoms are there in the sample ?

4

5.6

$8.431 \times 1 0^{23}$

$3.372 \times 1 0^{24}$

No. of atoms in $1$ mole of $PC l_{3} = 4$
No. of atoms in $1.4$ moles of $PC l_{3}$
$= 4 \times 1.4 \times 6.022 \times 1 0^{23}$
$= 3.372 \times 1 0^{24}$

Q. A sample of phosphorus trichloride (PCl3​) contains 1.4 moles of the substance. How many atoms are there in the sample ?

4

5.6

8.431×1023

3.372×1024

No. of atoms in 1 mole of PCl3​=4 No. of atoms in 1.4 moles of PCl3​ =4×1.4×6.022×1023 =3.372×1024

Q. A sample of phosphorus trichloride $(PC l_{3})$ contains 1.4 moles of the substance. How many atoms are there in the sample ?

$8.431 \times 1 0^{23}$

$3.372 \times 1 0^{24}$

No. of atoms in $1$ mole of $PC l_{3} = 4$
No. of atoms in $1.4$ moles of $PC l_{3}$
$= 4 \times 1.4 \times 6.022 \times 1 0^{23}$
$= 3.372 \times 1 0^{24}$