Answer is: C) 2MgO.
Balanced chemical reaction:
2Mg + O₂ → 2MgO + heat.
1) The same number of atoms is on each side of the equation: two magnesium atoms and two oxygen atoms.
2) In magnesium oxide (MgO), magnesium has oxidation number +2 and oxygen -2, because compound must be neutral.
3) The same mass is represented on each side of the equation: because there is same number of atoms, the mass is the same.
Answer:
The correct answer is option C.
Explanation:
Law of conservation of mass states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.
This also means that total mass on the reactant side must be equal to the total mass on the product side.
When magnesium reacts with oxygen it burns with bright dazzling light flame to give magnesium oxide and heat as a product. The balance chemical reaction is given as :
[tex]2Mg(s)+O_2(g)\rightarrow 2MgO(s)+heat[/tex]
According to reaction, 2 moles of magnesium reacts with 1 mole of oxygen gas to give 2 moles of magnesium oxide and heat.
