Which of the following statements is/are true of combustion of gasoline in O 2 ? 1. The combustion reaction is spontaneous, so the free-energy change is negative.

2. The combustion reaction is spontaneous, so the free-energy change is positive.

3. The free energy of the system increases as the reactants are converted to products.

2b2t

explanation:

2b2t

b. is the answer hoped i        

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.