Một dung dịch x có chứa 0, 0 1 mol ba2 + + 0,01 mol NO3 trừ- và a mol O2 - b mol Na + + để trung hòa 1,2 dung dịch X vì người ta cần dùng 200 ml dung dịch HCl 0,1M khối lượng chất rắn thu được khi cô cạn dung dịch X là

I Don't understand you question bro which language is this

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.