Which of the following situations, by itself, would most likely result in the least error in the calculated value of the heat of reaction?

The a metal retainer that keeps the rolling elements evenly spaced. n a. seal n b. separator n c. bearing n d outer race

Acombination reaction is when two or more combine to form one product. a decomposition reaction is when a substance breaks down into two or more simpler substances in a chemical reaction.

Anybody wanna ? (picture included? )