What is the density of nh3 at 800 torr and 25 c

Density ca n be calculated as follows:

d=P(FW)/RT  

d = density , FW formula weight which is 17 .031 g/ mol

R = gas constant 0 .082 6 L atm K−1 mol−1

T = temperature, 25 C or 298 K

P = pressure 800 torr or 1.053 atm

Therefore

d=P(FW)/RT  

= 1.053 * 17.031 /0.08206 *298

= 0.733 g/ L

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.