A pencil has a mass of 10g and a length of 5cm, width of 1cm, and height of 1cm .

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

How many atoms are there in 5.70 mol of mg

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms