Answer:
A coffee cup calorimeter is great for measuring heat flow in a solution, but it can't be used for reactions that involve gases since they would escape from the cup. The coffee cup calorimeter can't be used for high-temperature reactions, either, because they would melt the cup.
It's a base because it increases the concentration of hydroxid ions
The answer is 2.138 g of H2
A is correct because there is no reaction involved
