What is the molecular formula of a compound that had an empirical formula of PO2 and a molecular mass of 189g/mol?

the correct answer is option d

explanation:

i was wrong its d because they dont use cm when calculating square roots

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.