List the different signs that tell you a chemical reaction may have occurred. Then for each sign, write down TWO examples from day to day life where you have seen these reactions occur. (you should have 10 total; try to come up with examples on your own. although you may have to research the one where a solid is formed.)

What is the maximum amount of al2(so4)3 which could be formed from 15.84 g of al and 12.89 g of cuso4?

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.

What does a numerical subscript following an element in a chemical formula mean?