2C2H6 + 7O2 → __CO2 + 6H2O What coefficient will need to be placed in the blank in order for the following equation to be correctly balanced?

A.
1

B.
3

C.
4

D.
7

From the Combustion formula of Organic Compounds

Exactly 4 Moles of CO2 would make the equation balanced

So

OPTION C

4MOLES

increased stability in the completion of fluorine's outer shell.

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.