Aprocess stream of pure methanol liquid enters a heat exchanger at 25°c and leaves as a vapor at 100°c. if methanol gas at 25°c were used instead at the same mass flow rate, the amount of heat required to reach 100°c would be

the maximum mass of nh3 is nh3 in grams

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.

it is b that is the answer.