calculate the volume of O2 produced at 1.00 atm and 273 K by the decompostition of 10.5 g KClO3. 2KClO3 --> 2KCl + 3 O2

i'm assuming that the correct answer is indeed the first one/ "a"..

answer; talc and gypsum;

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.