What is the freezing point (in c) of a 1.56 m aqueous solution of cacl2? (report amount to three decimal points)

As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false