I need help with this im giving 15 points give me correct answer.

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude

What information does a complete ionic equation give that the balanced equation doesn’t show?