Determine the molal concentration of 71.5 g of linoleic acid,
C12H3202, in 525 g of hexane, C6H14.

0.49 M

Explanation:

Given data:

Mass of solute = 71.5 g

Mass of solvent = 525 g

Molarity of solution = ?

Solution:

Number of moles of solute:

Number of moles = 71.5 g/ 280 g/mol

Number of moles = 0.255 mol

Now we will calculate the molarity:

Molarity =  number of moles of solute/ litters of solution

1 Kg = 1 L

525 g × 1 kg / 1000 g

0.525 kg or 0.525 L

Molarity =  0.255 mol / 0.525 L

Molarity = 0.49 M

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.