If you have a 28 g sample of N2 gas in a 0.5 L flask at a temperature of 29 C. What must be the pressure.
and
A gas occupies a volume of 584 mL at a pressure of 770 mL of Hg. When the pressure is changed, the volume becomes 603 mL If the temperature stays constant, what is the new pressure in mm of Hg.
1. We use for the first question Mendeleev Klapiron's formula
pV=(m/M)RT
R=8.31J/mol*K
T=273+29=302 K
V=0.5L
p=mRT/MV=28g*8.31*302K/28g/mol*0.5L=5019.24=5.02 kPa
2. New pressure is 795.05 ml of Hg.
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