What is the balanced equation for the unbalanced equation
Mg(s) + O2(g) -> MgO(s)

2Mg(s) + O2(g) -> 2MgO(s)

Explanation:

Mg(s) + O2(g) -> MgO(s)

1 Mg atom and 2 O atoms on the reactant side  |  1 Mg atom and 1 O atom on the product side.

add a 2 infront of MgO to balance the O atoms:

Mg(s) + O2(g) -> 2MgO(s)

Now there's 1 Mg atom and 2 O atoms on the reactant side |  2 Mg atoms and 2O atons on the product side.

Now add a 2 infront of the Mg on the ractant side:

2Mg(s) + O2(g) -> 2MgO(s)

Now there are 2 Mg and 2 O atoms on both the reactant and product sides.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.