Calculate the density of cobalt from the mass of the sample and its volume. Mass = 26.7 g
Volume = 3.0 cm3
Give your answer to two significant figures.
Density
g/cm3

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?