5. which of the following is a chemical reaction?
a iron rusts
b. water freezes
c. sugar dissolves in water.
d. salt and pepper are mixed in a dish.
6. abby is trying to identify different liquids based on their physical properties. she has 4

What methods could you use to solubilize calcium carbonate

In the reaction h2co3 (aq) + 3nh3 (aq) = 2 nh4+ (aq) + co3 2-, how many electrons are transferred?

How does a sample of helium at 15 degree celsius compare to a sample of helium at 215 k? a) the helium at 15 degrees celsius has a higher average kinetic energy that the sample at 215 k. b) the helium at 15 degrees celsius has lower nuclear energy that the sample at 215 k. c) the helium at 15 degrees celsius has slower- moving atoms that the sample at 215 k. d) the helium at 15 degrees celsius has smaller atoms than the sample at 215 k.