Question

Which of the following equations has correct formulas and also is a balanced equation?

a. CaCO3 - > CaO + CO3
b. 3KCl + HNO3 - > 3HCl + KNO3
c. 2Be + O2 - > 2BeO
d. Mg + O2 - > MgO2

Answer 1

this question two answers which is C and D they are balanced to the right tab.

Answer 2

The equations that has the correct formulas and also is a balanced equation are:
2Be + O2 - > 2BeO
Mg + O2 - > MgO2
The answer are letters C and D. The rest of teh choices are not balanced chemical equations.