Homework Help: chemistry

Posted by darali on Monday, May 17, 2010 at 2:28am.

Consider a 675-mL container at 499 °C in which the pressure of nitrogen is 1.98x106 Pa.
a) What mass of nitrogen (in g) is present in this container?
b) How many molecules is this?

chemistry - DrBob222, Monday, May 17, 2010 at 1:02pm
PV = nRT
Solve for n. V must be in L, I would convert Pa to atm and you must convert T in degrees C to Kelvin. Then n = grams/molar mass. Solve for grams.

b)One mole contains 6.022 x 10^23 molecules. Go from there.

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