Iwill give brainiest! answer asap. how does the law of conservation of mass apply to this reaction: c2h4 + 3o2 → 2h2o + 2co2 ?

only the oxygen needs to be balanced. there are equal numbers of hydrogen and carbon.

the equation needs to be balanced. there are fewer oxygen atoms in the equation than hydrogen or carbon.

the law of conservation of mass has already been applied. there is an equal number of each element on both sides of the equation.

each element needs to be balanced.

The law of conservation of mass has already been applied. There is an equal number of each element on both sides of the equation.

Explanation:

We are given;

The equation;

C₂H₄ + 3O₂ → 2H₂O + 2CO₂

We need to ask ourselves the following questions;

Is the equation balanced?

Yes, the equation because the number of atoms of each element is equal on both sides of the equation.That is; Reactants: 2 carbon atoms, 4 hydrogen atoms and 6 oxygen atoms. Products: 2 carbon atoms, 4 hydrogen atoms and 6 oxygen

What is the law of conservation of mass?

According to the law of conservation of mass, the mass of reactants should always be equal to the mass of the products in chemical reactions.

What makes the equation obey the law of conservation of mass?

For an equation to obey the law of conservation of mass, it must be balanced.In this case, the equation given is already balanced and therefore obeys the law of conservation of mass.