Question

Question:

Answer 1

Review this chemical equation:

O2 + CH4 yields CO2 + H2O

Which answer best explains what must be done to make this equation comply with the law of conservation of mass? (1 point)

You must add a coefficient of 2 to the oxygen molecule on the left and a coefficient of 2 to the water molecule on the right.
You must add a coefficient of 2 to the methane (CH4) molecule on the left and a coefficient of 2 to the carbon molecule on the right.
You must add a coefficient of 4 to the oxygen molecule on the left and a coefficient of 4 to the water molecule on the right.
You must add a coefficient of 2 to the oxygen molecule on the left and nothing to the molecules on the right.

Answer 2

this is just balancing equations so we have to make each atom be equivalent on both sides of the equation