Which explains why the mass of Wand Z combined is greater than the mass of the new substance WZ?
A. The reaction destroyed some matter.
B. The particles in substance W attached to substance Z.
C. The physical change caused the particles to get smaller.
D. The reaction created a gas, which escaped into the
atmosphere.

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?