Question

A mixture of 2 g and 32.0g oxygen is mixed. How much litres of gas it contains at stp

Answer 1

V=1L

T=O C=273 K

Here,O2 and H2 are assumed to be having ideal gas behaviour

no.of moles of o2=4/32=0.125 moles

P1=nrt/v=0.125*(0.082 L atm K^-1 mol^-1)*273/1L = 2.80 atm

no.of moles of h2=2/2=1 mole

P2=nrt/v=1*(0.082 L atm K^-1 mol^-1)*273/1L = 22.386 atm

Total pressure in the mixture= 2.80+22.38 atm= 25.215 atm