A glass tube of volume 112 ml containing a gas is partially evacuated till the pressure in it drops to 3-8 - 10-5 torr at 00 C- The number of molecules of the gas remaining in the tube is

A glass tube of volume 112 ml containing a gas is partially evacuated till the pressure in it drops to $3.8 \times 10^{- 5}$ torr at $0^{0} C$ . The number of molecules of the gas remaining in the tube is

Q. A glass tube of volume 112 ml containing a gas is partially evacuated till the pressure in it drops to

3.8 \times 10^{- 5}

torr at

0^{0} C

. The number of molecules of the gas remaining in the tube is

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A glass tube of volume 112 ml containing a gas is partially evacuated till the pressure in it drops to 3.8×10−5 torr at 00 C. The number of molecules of the gas remaining in the tube is

The correct option is B 1.5×1014PV=nRT n=PVRT=3.8×10−5×112×10−362.4×273 =0.02461×10−8 mol No. of molecules = 0.02461×10−8 mol =1.5×1014

A glass tube of volume 112 ml containing a gas is partially evacuated till the pressure in it drops to $3.8 \times 10^{- 5}$ torr at $0^{0} C$ . The number of molecules of the gas remaining in the tube is

The correct option is B $1.5 \times 10^{14}$
PV=nRT
$n = \frac{P V}{R T} = \frac{3.8 \times 10^{- 5} \times 112 \times 10^{- 3}}{62.4 \times 273}$
$= 0.02461 \times 10^{- 8} m o l$
No. of molecules = $0.02461 \times 10^{- 8} m o l$
$= 1.5 \times 10^{14}$