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It increases because the mass of the magnesium adds to the mass of the oxygen. Also, the magnesium expands and magnesium oxide is formed.

The oxidation reaction is:

Mg + O2 = 2 MgO

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12y ago
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16y ago

Ithink it may be because it produces metal oxides when magnesium is burnt and this does not happen to woods

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12y ago

Because after oxidation new compounds appear: magnesium oxide (MgO) and copper oxides (Cu2O and CuO).

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Q: Why does the mass of magnesium increase when you burn it in air?
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What happens to the mass when magnesium is heated in air?

When magnesium is heated in air, it forms magnesium oxide and so the total mass increases.


Will magnesium burn with a brilliant white light if heated above 100 degrees?

Yes, magnesium burn in air.


Why does magnesium get heavier when its burned?

What happens when magnesium burns? What do you need for magnesium to burn? Will magnesium burn if you have it in a closed container? No. Why not? It needs air. Why does it need air? There is oxygen in the air. Magnesium needs oxygen to burn. So, when magnesium burns, you start with magnesium and end up with a compound that contains both magnesium and oxygen. Magnesium has an atomic weight of 24. Oxygen has an atomic weight of 16. So if you start out with 24 grams of Magnesium you should end up with 40 grams of Magnesium Oxide.


What happens to the MASS when MAGNESIUM is burnt inside a CONTAINER?

According to the Law of Conservation of Mass, matter can neither be created nor destroyed, only change forms. Therefore, if you burn magnesium inside of a closed container, the mass will remain the same. ---- However you will get heavier ash than you had magnesium as the Oxygen in the air in your container will be transfered. But Total Mass is conserved.


When you burn magnesium in air what might show you a chemical reaction has taken place?

I don't know how you know afterwards but when you burn magnesium in air it burns this really bright white light.


What happens to the mass of magnesium ribbon after heating?

When magnesium is heated it reacts with oxygen in the air to for Magnesium oxide (MgO) 2Mg + O2 = 2MgO Magnesium oxide is white, so when it is heated, it produces a bright white light.


What happens when you magnesium is heated in air?

Magnesium's mass increases as it becomes magnesium oxide.


How and why does the mass of a magnesium strip change when it is heated strongly in air?

When a magnesium strip is heated strongly in air, it undergoes a chemical reaction called oxidation. Magnesium reacts with oxygen in the air to form magnesium oxide. The mass of the strip increases because magnesium combines with oxygen atoms from the air to form a heavier compound (magnesium oxide).


When magnesium burn in the air a compound form what is the name of the compound?

magnisium sulphate


What temperature does oxygen react with magnesium?

Magnesuium burn in air at room temperature.


Why when magnesium ribbon is burnt the ash is heavier?

When Magnesium burns, it is actually combining with oxygen in the air to form a new compound, magnesium oxide. If we were to carefully weigh a piece of magnesium before and after burning it, you would see that its weight increased by about one third. For example, if you start with 100 grams of magnesium, after the burn you would end up with about 130 grams of magnesium oxide. The fact that the magnesium oxide you create by burning is powdery, means that it takes up more space (size or volume) than the solid magnesium did.


How could you prove that magnesium is a more reactive metal than zinc or iron?

Magnesium react with water and burn easily in air.