Question

when Magnesium is burnt in air there is an increase in mass after the reaction give reason

Answer 1

Hey Mate
Here is your answer

When Magnesium is burnt it gets mixed with the oxygen and forms magnesium oxide (MgO) . This is why there is an increase in mass after the reaction.

Hope it helps
Cheers!!
Pls mark as brainliest if it helps

Answer 2

Answer:

because it covers the space between the molecule of water