If you burn a piece of magnesium, the mass of the piece increases. Why?
2007-09-30 14:31:46 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Burning magnesium creates a synthesis reaction, a very fun one to observe at that, where the strip of magnesium glows a very brilliant white light that my students claim can be seen through closed eyes.
The chemical equation is 2 Mg(s) + O2(g) ~> 2 MgO(s)
Note what is solid on both sides of the equation. As you can see, some of the oxygen from the air in a gas state is forced into a solid state. The solid's mass increases because of chemical combination with the gaseous oxygen.
2007-09-30 14:35:38 · answer #1 · answered by lhvinny 7 · 1⤊ 0⤋
MgO has a molecular bond, so it would not have a numerical prefix. For now, think of of it as though any compound with a steel in it will be molecular, and subsequently no longer want a prefix.
2016-12-28 08:14:19 · answer #2 · answered by Anonymous · 0⤊ 0⤋
I don't know about all of that, but my mom has to take mag. ox. in pill form. Wonder what it does in the body?...
2007-09-30 14:36:55 · answer #3 · answered by Anonymous · 0⤊ 0⤋
when u mix two or more substances together & a change occurs, it's called a chemical reaction.
2007-09-30 14:36:13 · answer #4 · answered by animals_r_cute!!! 2 · 0⤊ 1⤋
Because air(oxygen) has been bonded to it, making it heavier.
2007-09-30 14:33:55 · answer #5 · answered by sakuramiko16 2 · 1⤊ 0⤋
its just a chemical reaction. thats what happens when a chemical reacts.
2007-09-30 14:33:37 · answer #6 · answered by Anonymous · 0⤊ 1⤋