Question

# For an ideal gas, the number of moles per litre in terms of its pressure $$P$$ , gas constant $$R$$ and temperature $$T$$ is:

A
PT/R
B
PRT
C
P/RT
D
RT/P

Solution

## The correct option is C $$P/RT$$From ideal gas equation, $$PV=nRT.$$No. of moles per liter$$=\cfrac{n}{V}.$$$$PV=nRT$$$$\cfrac{P}{RT}=\cfrac{n}{V}$$$$\therefore$$ No. of moles per liter $$=\cfrac{n}{V}=\cfrac{P}{RT}.$$Chemistry

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