Find the approximate number of molecules in vessel of volume 7 litres at 0° C at 1.3× 105 pascals:

Question

Find the approximate number of molecules in vessel of volume 7 litres at 0° C at 1.3× 105 pascals: (A) 2.4× 1023 (B) 3× 1023 (C) 6× 1023 (D) 4.8× 1023

Tardigrade Admin · Accepted Answer

N=(P V/R T)× NA =(1 . 3 × 105 × 7 × 10- 3/8 . 314 × 273)× 6.023× 1023 =2.4× 1023

Q. Find the approximate number of molecules in vessel of volume $7$ litres at $0^{\circ} C$ at $1.3 \times 1 0^{5}$ pascals:

$2.4 \times 1 0^{23}$

$3 \times 1 0^{23}$

$6 \times 1 0^{23}$

$4.8 \times 1 0^{23}$

$N = \frac{P V}{RT} \times N_{A}$
$= \frac{1.3 \times 1 0 ^{5} \times 7 \times 1 0 ^{- 3}}{8.314 \times 273} \times 6.023 \times 1 0^{23}$
$= 2.4 \times 1 0^{23}$

Q. Find the approximate number of molecules in vessel of volume 7 litres at 0∘C at 1.3×105 pascals:

2.4×1023

3×1023

6×1023

4.8×1023