of the reactants. We see that we have #6 + 4=10# oxygen molecules on the RHS, so we will have #10/2 = 5# molecules on the LHS. It shows the number of units of each substance involved. #C_3H_8 + O_2 -> 3CO_2 + 4H_2O# The last step is to determine the coefficient of the oxygen gas on the LHS. In this example, it would be: Carbon: 3 Carbon: 1 Hydrogen: 8 Hydrogen: 2 Oxygen: 2 Oxygen: 3. A chemical equation describes what happens in a chemical reaction.The equation identifies the reactants (starting materials) and products (resulting substances), the formulas of the participants, the phases of the participants (solid, liquid, gas), the direction of the chemical reaction, and the amount of each substance. A balanced equation. To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. The balanced equation will appear above. Use uppercase for the first character in the element and lowercase for the second character. and products. Examples: Fe, Au, Co, Br, C, O, N, F. Ionic charges are not yet supported and will be ignored. The balanced equation will appear above. To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. Examples: Fe, Au, Co, Br, C, O, N, F. Ionic charges are not yet supported and will be ignored. First of all, to balance these equations, list the number of each atom, for both sides of the equation. Direct link to this balanced equation: Instructions on balancing chemical equations: Enter an equation of a chemical reaction and click 'Balance'. The answer will appear below; Always use the upper case for the first character in the element name and the lower case for the second character. Now I multiply the #CO_2# by #3# to match the amount of #C# as on the LHS. The final balanced chemical equation is CO + H2O + PdCl2 = HCl + CO2 + Pd | Chemical Equation Details carbon monoxide + Water + Palladium(II) chloride = hydrogen chloride + carbon dioxide + Pd | (There will be no need for state symbols.) models a chemical reaction using the formulae. Balance the following equation: C3H8 + O2 ----> CO2 + H2O. Use uppercase for the first character in the element and lowercase for the second character.