Given the balanced equation representing a reaction:
2fe + 3cu2+ ==> 2fe3+ + 3cu
when the iron atoms lose six moles of electrons, how many moles of electrons are gained by the copper ions?
(1) 12 moles (3) 3 moles
(2) 2 moles (4) 6 moles

In the lab, ammonia was mixed with water to form ammonium hydroxide. what is/are the reactant(s)? o water and ammonia o ammonia o ammonium hydroxide need

What does a numerical subscript following an element in a chemical formula mean?

Animals that reproduce sexually either do it through external or internal fertilization. read the following statement and decide if it is true or false. birds reproduce through external reproduction which is because the female will then be able to protect the egg.