Galena is a mineral that creates smooth, flat surfaces when it breaks. It is a 2.5 on Mohs scale. Galena . A)has cleavage and is soft

B)has fracture and is very hard

C)has fracture and a shiny luster

D)has cleavage and no streak

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?