In this equation 2mg+o2=2mgo what is the coefficient to the oxygen molecule a,2 b,4 c,1 d,0

Hello!

In this chemical equation, there are two main elements. Those elements are magnesium (Mg) and oxygen (O).

Molecules are a group of atoms bonded together, and in this case, the oxygen molecules is O2, but not 2MgO because there are two different molecules in this compound.

Coefficients are a number that multiply an entire molecule, and are also placed in front of it. In this case, O2 has no coefficient, but a subscript of 2. But, every molecule in this equation must have a coefficient and if add a coefficient of 1 to the oxygen molecule, it does nothing to the overall balancing of equations.

Therefore, the coefficient to the oxygen molecule is choice C, 1.