When magnesium oxide is sufficiently heated, oxygen gas is evolved.
You get a grey powder because magnesium is higher up in the reactivity series than Copper - (magnesium is more reactive than copper) therefore when you heat it up there is a displacement reaction. That grey powder is actully magnesium oxide and copper e.g Copper oxide + magnesium = magnesium oxide and copper.
Magnesium Oxide
If you heat magnesium and oxygen together then you will make MgO or Magnesium oxide.
Hydrogen gas is released when calcium and water react.
Magnesium oxide is not a good heat conductor, so it will keep all the heat inside the furnace.And if u don't find the answer check another site :p
an exothermic combination reaction
you get magnesium oxide + iron
Magnesium reacts with steam faster than cold water because magnesium needs to burn to get magnesium oxide and to get magnesium oxide there has to be heat and since steam is already heated it doesn't need much time, but the cold water needs time to heat first to react.
the combustion of magnesium oxide is carbon+sulfur_carbonate sulfur
Magnesium oxide, MgO (base). It is a form of rust.
magnesium oxide (MgO)
Magnesium oxide don't react with water.
Magnesium carbonate
You get a grey powder because magnesium is higher up in the reactivity series than Copper - (magnesium is more reactive than copper) therefore when you heat it up there is a displacement reaction. That grey powder is actully magnesium oxide and copper e.g Copper oxide + magnesium = magnesium oxide and copper.
Magnesium Oxide
If you heat magnesium and oxygen together then you will make MgO or Magnesium oxide.
Hydrogen gas is released when calcium and water react.