When magnesium is heated in air, it reacts with oxygen to form magnesium oxide.
2Mg(s) + O2(g) → 2MgO(s)
If the mass of the magnesium increases by 0.335 g, how many grams of magnesium reacted?
A. 0.882 g B. 0.441 g C. 0.509 g D. 1.02 g E. not enough information

imma come back to you hold on

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

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.

50.23 i believe is correct but don't quote me on that.