Calculating Grams of Oxygen Combined with Iron to Form Iron Oxide

Question:

11.1 grams of iron combine chemically with oxygen to form 15.9 g of the compound, iron oxide. How many grams of oxygen were combined?

Answer:

4.8 grams of oxygen were combined with iron to form the compound iron oxide. The correct answer is 4.8 g.

Explanation:

To determine the amount of oxygen combined with iron, we need to calculate the difference in mass between the compound (iron oxide) and the initial mass of iron.

Given:

Mass of iron = 11.1 g

Mass of iron oxide = 15.9 g

Calculations:

Mass of oxygen = Mass of iron oxide - Mass of iron

Mass of oxygen = 15.9 g - 11.1 g

Mass of oxygen = 4.8 g

Therefore, 4.8 grams of oxygen were combined with iron to form the compound iron oxide. The correct answer is 4.8 g.