Crystal can get to her favorite grocery store at an average velocity of 2.6 m/s. If it takes her 76.92 seconds to get there, how far has she traveled?

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

answer; talc and gypsum;

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.