How many neutrons are in 10 moles of aluminum?

If 1.0mol of helium gas (He) at standard temperature and pressure (STP) has a volume of 22.4L, how many moles of carbon tetrachloride gas (CCl4) will be present in a container with a volume of 22.4L?

of nitrogen gas are contained in a container. The gas exerts a pressure of on the container.

If pressure is kept constant, what is the final molar amount of gas present in the container if gas is added until the volume has increased to ?