Consider the equation 4 fe+3 o2 → 2 fe2o3 . in this equation, 3 o2 is a

Explanation:

While writing a chemical reaction equation, the number of atoms or molecules written on left hand side represent reactants. Whereas the number of atoms or molecules written on right hand side represent products.

For example, in the given equation, .

Here, 4 Fe and 3 are on the left hand side and thus these are the reactants. On the other hand, 2 is written on right hand side and thus it is the product.

Therefore, we can conclude that in this equation, 3 O2 is a reactant.

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.

level 4 to level 2 : ))