To balance an equation you want there to be the same number of each element on both sides b) CO+O2 yields CO2 Count the number you have of each element on each side There is one C on both sides but there are three O on the left side but only two on the right side So you would add coefficients to make the O equal 2CO+O2 yields 2CO2 Now it's balanced because you have 2 C on each side and 4 O on each side
