Calculate the atomic mass of silicon, which occurs naturally as 92% silicon-
28, 5% silicon-29, and 3% silicon-30.

28.11g Si

Explanation:

There is a whole formula for this.

Atomic mass= (Percent Abundance* relative isotope mass) + (percent abudance*relative isotope mass) + (Percent Abundance*relative isotope mass)

(0.92*28)+(0.05*29)+(0.03*30)= 28.11g

the answer is 0.8m.

by: nicholas

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.