Read our article on how to balance chemical equations or ask for help in our chat. Magnesium metal will react with CO2 in the form of dry ice to make carbon and MgO. For instance equation C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but PhC2H5 + O2 = PhOH + CO2 + H2O will; Compound states [like (s) (aq) or (g)] are not required. The Calitha - GOLD engine (c#) (Made it … No, it was not. From the original equation, you first need to write each component separately. For example, C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but XC2H5 + O2 = XOH + CO2 + H2O will. What a great software product!) Read our article on how to balance chemical equations or ask for help in our chat. The balanced equation should have been: 2 Mg (s) + O2 (g) --> 2 MgO (s) You can use parenthesis or brackets []. Multiply #Mg# on the left side by #2# to balance the magnesiums. What a great software product!) Compound states [like (s) (aq) or (g)] are not required. This program was created with a lot of help from: The book "Parsing Techniques - A Practical Guide" (IMHO, one of the best computer science books ever written. If you do not know what products are enter reagents only and click 'Balance'. Compound states [like (s) (aq) or (g)] are not required. ); The Gold Parsing System (Hats off! This program was created with a lot of help from: The book "Parsing Techniques - A Practical Guide" (IMHO, one of the best computer science books ever written. MgO2 is not MgO. The rules for balancing an equation state that only the coefficients can be changed, not the structural formulas for the reactants or products. Mg + CO2 --> MgO + C. When magnesium burns in the oxygen in the air it will react with the nitrogen in the air as well to make Mg3N2. In many cases a complete equation … For example, C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but XC2H5 + O2 = XOH + CO2 + H2O will. ); The Gold Parsing System (Hats off! #2Mg(s)+O_2(g)->2MgO(s)# Now, there are equal amounts of magnesium atoms and oxygen atoms on both sides, and so the equation is balanced. Input Equation Balanced Equation; MgCO3=MgO+CO2: MgCO3 = MgO + CO2: MnO2 + HCl = MnCl2 + Cl2 + H2O: MnO2 + 4HCl = MnCl2 + Cl2 + 2H2O: Mg + O2 = MgO The Calitha - GOLD engine (c#) (Made it … How To Balance Equations. How To Balance Equations. You can use parenthesis or brackets []. 2 Mg(s) + O2(g) → 2 MgO(s) As magnesium (Mg) has a valency of +2, and oxygen (O) has a valency of -2, the ratio would be 1:1, and magnesium oxide would be represented as MgO. #H_2 + O_2 = H_2O# Left side: H = 2; O = 2 (number based on the subscript) Right side: H = 2; O = 1 (number based on the subscripts; no subscript means that the element is just 1) Notice that the number of H is already balance but the number of O is not.