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 ----->...
The law of conservation of matter: matter cannot just disappear or appear from nothing. It must go somewhere. That could be into an elemental form or into a complicated compound, but it cannot just...
Step 1: Write down the word equation. e.g. Zinc oxide + carbon --> Zinc + Carbon dioxide Step 2: Write down the chemical formulae of the reactants and the products. e.g. ZnO + C --> Zn + CO2...
The molar coefficient can be adjusted. These are the big numbers before each atom that shows the molar ratio between that atom and all the other atoms within the equation.