posted by Connie .
A sample of Nitrogen(N2)& Helium has a volume of 250mL @ 30degrees celsius & a total pressure of 745 mmHg a)If the pressure is 32mmHg what is the partial pressure of the Nitrogen? b) What is the volume of the Nitrogen at STP?
Partial pressures are additive. So, total pressure - partial pressure of Hg = partial pressure of nitrogen.
Use PV = nRT (using nitrogen's partial pressure) to find volume.