If a person tells you she is 6 feet tall, is she basing that measurement on customary units or metric units? customary
metric

Iknow #2 is d. i just need to know why

Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change

Summarize possible ways in which phases of matter could combine to form a solution.