If 1.05 mol of an ideal gas at 274 K has a volume of 207 L, what will its pressure be in kPa?

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

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.