Question

Which of the following is a correctly balanced equation?




A.
2Cu + O2 --> 2CuO


B.
Mg + O2 --> MgO2


C.
3KCl + HNO3 --> 3HCl + KNO3


D.
CaCO3 --> CaO + CO3

Answer 1

which reaction has the same number of every different type of atom on both sides?

I like to make a table that lists all the atoms of the reaction on both sides and add them up

Answer 2

Thank you so much

Answer 3

Is it B ?

Answer 4

B is balanced, but it's not a correct reaction, because magnesium and oxygen don't combine in a 1:2 ratio

Answer 5

I don't know it