Which of the following is a chemical property of the noble gases? a. the boiling points are close together. b. the melting points are close together. c. they are unreactive. d. mass increases down the group.

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

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?

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false