when a mass of hydrogen at 25°C has a pressure of 1.454 atmospheres, how many molecules of hydrogen are there?

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PV=nRT

At 25°C and 1 atm we have 22.4 Liter/mol

So, at 1.454 atm we should have 32.56 L/mol

Now 1.454 atm*32.56L=n*0.0821*298K

n=1.94=moles

1.94 moles H2(6.0221415 × 10^23 molecules/1 mole H2)=

1.165 x 10^24 molecules...Show more