What is the density of a 0.300 g sample of argon gas at STP?

Which of the following are good traits of a hypothesis? it will be able to be testedit can predict an outcomeit will explain the observationsall of these

What produces wave a)sound b) heats c)transfer of energy d)vibrations

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.