Question

2CH4 + 4O2 → CO2 + 4H2O Which statement is true regarding the chemical equation? A) The equation is balanced. B) The 4 in front of the oxygen on the product side needs to be a 6 in order to be balanced. C) The 2 in front of methane, CH4, needs to be changed to a 3 in order to be balanced. D) The carbon dioxide on the product side needs a 2 in front of it in order for it to be balanced.

Answer 1

The answer is D). Put a 2 in front of the CO2 on the products side. 

Answer 2

Answer: The correct answer is Option D.

Step-by-step explanation:

A balanced equation follows Law of conservation of mass. This law states that mass can neither be created nor be destroyed but it can only be transformed from one form to another. In a chemical reaction, mass is always conserved.

This also states that the total number of individual atoms on the reactants side must be equal to the total number of individual atoms on the product side.

For the given chemical reaction:

`2CH_4+4O_2\rightarrow CO_2+4H_2O`

On the reactant side:

Number of Carbon atoms = 2

Number of Hydrogen atoms = 8

Number of Oxygen atoms = 8

On the product side:

Number of Carbon atoms = 1

Number of Hydrogen atoms = 8

Number of Oxygen atoms = 4

In order to balance the number of atoms, 2 must be added infront of
`CO_2` molecule, in order to balance the equation.

Hence, the correct answer is Option D.