You add two substances together in a sealed bag and a chemical reaction happens. the mass before the reaction was 167 g. what was the mass after the reaction? why?

What is the percentage composition of carbon in the compound ch4

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?

•hydration •dissociation •dissolving which one goes to which