What is the mass of an object with a density of 2.77 g/ml with a volume of 10.77L?

1. list three scientific reasons cockroaches may fly.

Is this correct if not can u correct me

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?