Q4. Which of the following substances will be a solid at 20 °C and will melt when placed in a beaker of hot
water at 80 °C?
melting point in °C
boiling point in °C
249
ОА
122
59
B
-7
30
2403
27
D
-32​

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?