1. Briefly explain why we expect to see the mass go up as the iron undergoes a reaction in this experiment.2. Magnesium undergoes a similar reaction with oxygen. Write the balanced chemical equation for the reaction between magnesium and oxygen gas. 3. Consider a reaction where 0.432 g of magnesium ribbon undergoes the above reaction to make 0.745 g of magnesium oxide as a product. How many moles of magnesium are in the final product? How many moles of oxygen?