Answer:
1st page, number a-ENergy is added or absorbed
I cant see the answers on the 2nd page
Explanation:
1. A gas is released.
2. Energy is absorbed.
3. Color change.
4. Energy is given off.
5. Change in odor.
Fe2+ lose electrons to become Fe 3+ hence oxidized
maO4- is the oxidizing agent
Question 1: D
Question 2: B C E F
Question 3: A
Question 4: A
Question 5: A
Percentage composition of oxygen = (80/134) * 100% = 59.7%.
