Answer :
Number of moles present is 0.5mol.
what is ideal gas law?
The general gas equation, also known as the ideal gas law, is the equation of state for a fictitious ideal gas. The equation for the ideal gas's relationship to pressure P, volume V, temperature T, and number of moles n is known as the ideal gas law.
Use P V = n R T
R = 0.08206 L -atm /mol -K when the pressure is in atmosphere atm, the volume is in litres L, and the temperature is in Kelvin K.
One atm is equal to 760.0 mm Hg, so depending on how the pressure changes, there will either be a division or multiplication.
Divide the value in mmHg by 760.0 mmHg/atm to convert it to atm.
P= 912mmHg /760mmHg/atm=1.2atm
to convert °C to kelvin,
K=°C +273= 20+273=293K
R=0.08206
Add these values to given equation,
n=PV/RT
= 1.2×10÷0.08206×293
= 12÷24.02
=0.5mol
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