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5.

In the initial demonstration what was the limiting reagent (magnesium or oxygen) and why?

6.

In your own investigation what was the limiting reagent (magnesium or oxygen) and why?

7.

What three things were done in your experiment to try to ensure that in the investigation the amount of oxygen was not so limited that the reaction could not go to completion?

a.

b.

c.

8.

What is meant by a “reaction going to completion”?

9.

Explain at the molecular level why the balanced chemical equation is so important in determining experimental yield.

10.

In your own words explain why in the calculation process we determined mass of the reactant, then moles of reactant, then looked at the mole ratio to determine the number of moles and mass of product formed? In other words, why don’t we just deal with masses?

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