A 5.64 g sample containing Cu is dissolved in 20.0 mLs of water. A 5.0 mL aliquot of this solution is diluted to 100.0 mLs and analyzed by an instrumental method. The measured Cu concentration in the diluted solution is 5.2 ppm. Calculate the amount of Cu in this sample. Calculate the weight percent Cu in this sample. Also calculate the concentration of Cu in the 20.0 mLs of water in molarity.

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.