How many atoms of argon gas are contained in a 336 liter sample of argon gas at STP?

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.

Chemistry worksheet - i am not sure what they are asking for exactly?

Once similarity and one difference between a mixture of elements and a mixture of compounds