Predict the mass of oxygen that will be left over after the reaction of 48.6 grams of magnesium with 50.0 grams of oxygen?

why do you think there was leftover oxygen? (why did not all of it react) ?

Oxygen and magnesium combine in a chemical reaction to form this compound. After it burns, it forms a white powder of the magnesium oxide. Magnesium gives up two electrons to oxygen atoms to form this powdery product. This is an exothermic reaction.

Exothermic Reaction

Explanation:

Oxygen and magnesium integrate in a chemical reaction to form this compound. After it burns, it paperwork a white powder of the magnesium oxide. Magnesium gives up two electrons to oxygen atoms to shape this powdery product. This is an exothermic response.