you have two identical balloons, a dowel. and a piece of string. How can you use those things to show that a gas has mass and volume?

Margaret wants to make an orange flavored drink by stirring powdered drink mix into a glass of water. she doesn't like drinks that have small clumps of powdered solid in them, so she wants the drink to be a perfect solution. what factors should margaret not consider when deciding how much powder to add to her glass of water?

What is the overall order of reaction for rate = k[no]2[o2]

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?