A chemical reaction is balanced by changing?

Answer 1

To balance a chemical equation, you can change the coefficients (number of molecules). Remember: You cannot change the subscripts.

When we balance an equation we change the number of atoms on one or both sides of the equation by means of simple mathematical calculation. That is, we change the number of molecules of one or more reactants or products. When the number of atoms of each element is equal on both sides of the equation, and cannot be reduced equally, the balancing process is complete.

Answer 2

you need not to change anything to balance an equation , you just need to put coefficients before the substance in order to balance it according to the requirement...

example

NH3 + O2 + CH4 -----> HCN + H2O

it's unbalanced

so in order to balance it , we are supposed to put coefficients

2NH3+3O2+2CH4--->3HCN+6H2O

Now this is a balanced equation,

we balance it in order to conserve the masses

Answer 3

The amount of molecules/elements in the equation.

Answer 4

Chemical equations are balanced by adding cooeffiects.

Answer 5

A chemical reaction is balanced by changing only the coefficients. Never change the subscripts in the formulas.

Answer 6

the coefficients of the reactants & products

meaning, the numbers BEFORE the element's symbol--NEVER THE LITTLE NUMBERS BELOW THEM TO THE RIGHT!

Answer 7

coefficient

Answer 8

By adding coefficient

Eg) H2+02 ----> H20

Balanced equations - 2H2+o2 ----->2H2O