Imagine that you are in chemistry lab and need to make 1.00 l of a solution with a ph of 2.60. you have in front of you 100 ml of 7.00×10−2 m hcl, 100 ml of 5.00×10−2 m naoh, and plenty of distilled water. you start to add hcl to a beaker of water when someone asks you a question. when you return to your dilution, you accidentally grab the wrong cylinder and add some naoh. once you realize your error, you assess the situation. you have 80.0 ml of hcl and 87.0 ml of naoh left in their original containers. assuming the final solution will be diluted to 1.00 l , how much more hcl should you add to achieve the desired ph?

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >

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.