Question

calculate the no. of molecules of oxygen gas that occupies a volume of 224ml at 273K and 3atm pressure

Answer 1

you need to use P=nRt use 0.224 L as V 273 at 7 and 0 .082 as R your answer will give you number of moles of oxygen which you convert to number of molecules by multiplying moles 6.02X10exp23.
hope it will be help you...............