1. for part 2: single-displacement reactions: for each of the four single-displacement reactions, describe what happened in each well. if a chemical reaction occurred, write a balanced equation for it. then using the a, b symbols, write a general equation for a single-displacement reaction. here are the chemical formulas of the reactants for each reaction: • zinc – zn • copper sulfate – • aluminum – al • copper sulfate – • zinc – zn • silver nitrate – • copper – cu • silver nitrate –

Explanation:

Single displacement reactions is defined as the chemical reaction in which more reactive metal displaces less reactive metal in a chemical reaction. These type of reactions are studied with the help of reactivity series.

The metals which lie above in the series will displace the metals which lie below in the reactivity series.

General form of this type of reaction follows:

where, A is more reactive metal than B.

For the given reactants, the following reaction follows:

1) Zinc and Copper sulfate

The reaction will occur because zinc is more reactive than copper and will easily displace copper in a chemical reaction.

2) Aluminium and Copper sulfate

The reaction will occur because aluminium is more reactive than copper and will easily displace copper in a chemical reaction.

3) Zinc and Silver Nitrate

The reaction will occur because Zinc is more reactive than Silver and will easily displace silver in a chemical reaction.

4) Copper and Silver Nitrate

The reaction will occur because Copper is more reactive than Silver and will easily displace silver in a chemical reaction.

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.

the answer your looking for is c).