To what volume should 5.0 g of kcl be diluted in order to prepare a 0.25 m solution?

0.268 L

Explanation:

concentration is the number of moles of solute in 1 L of solution

number of moles of KCl - 5.0 g / 74.5 g/mol = 0.067 mol

the concentration of the solution to be prepared - 0.25 mol/L

concentration = number of moles of KCl / volume of solution

substituting the values in the equation

0.25 mol/L = 0.067 mol / V

V = 0.268 L

solution should be diluted to 268 mL to make a 0.25 M solution

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.