PLEASE HELP DUE AT 2PM I'M DESPERATE, WILL GIVE BRAINLEST!! 1. When magnesium is burned in air, its mass increases. Explain why this is.

2. When a match is burned in air, its mass decreases. Explain why this is.

3. This equation is unbalanced Na + F2 → NaF. Explain how you know it is unbalanced.

4. Why does it need to be balanced? Refer to the conservation of mass in your answer

5. A student heats up a metal and finds that its mass increases. The students says “this is because heat has been added.” Explain why this is incorrect.