Balancing Equations© Copyright NewPath Learning. All Rights Reserved. 94-4861Visit www.newpathlearning.com for Online Learning Resources.Conservation of MassIn any chemical reaction, atoms are never lost or gained, they are only rearranged. All atoms of the reactants are converted to atoms of the products, which is the reason chemical equations are balanced. The Law of Conservation of Mass states that the mass of the reactants must equal the mass of the productsmolecule, add the atomic masses of each element. Balancing Chemical EquationsThe in balancing an equation is to make a list of how many atoms of each element are on each side of the equation. The in front of the molecules tell you how many of each molecule there are. Balance the atoms one at a time by changing the in front of each formula until you have an equal number of each type of atom on both sides of the equation. Never change the subscripts. The times the subscript gives the total number of atoms. First, balance the atoms that occur in one substance on each side of the equation. Then balance the atoms that occur in compounds, before attempting to balance atoms that occur in elemental form such as H2, O2 or Cl2. Finally, be sure that all the are in the smallest possible whole number ratio.Balancing the equation N2 + H2 NH3 1. First balance the atoms in the compound, NH3. Place a 2 in front of NH3 which now makes it 2 atoms of N and 6 atoms of H on the right side of the equation. This balances the N atoms on each side of the equation but not the H. 2. By placing a 3 in front of the H atom on the left side, it increases the H atoms on the left side of the equation to 6, which makes it equal to the number of H atoms on the right side. The equation is now balanced. It tells us that 1 molecule of nitrogen combines with 3 molecules of hydrogen to produce 2 molecules of ammonia.There are two atoms of nitrogen and hydrogen on the left side and one nitrogen atom and three hydrogen atoms on the right side. ++ABCABCCA BABCreactantsproductsmass of reactants = mass of products4Al + O2 ➞ 2Al2O3reactantsproducts4 Al4 Al2 O6 O4Al + 3O2 ➞ 2Al2O3reactantsproducts4 Al4 Al6 O6 ON2 + H2 ➞ NH3N2 + H2 ➞ 2NH3reactantsproducts2 N2 N2 H6 HN2 + 3H2 ➞ 2NH3reactantsproducts2 N2 N6 H6 H3Amm1 Nitrogenmolecule3 Hydrogenmolecules2 Ammoniamolecules1.1.2.2.+In any chemical reaction, atoms are never lost or gained, they are only rearranged. All atoms of the reactants are convertedto atoms of the products, which is the reason chemical equations are balanced. The Law of Conservation of Massstates that the mass of the reactants must equal the mass of the productsmolecule, add the atomic masses of each element. 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By ppppllllllllaaaaaaaaaaaacinnnnnnnnnnnnnggggggggggggggggggggg aaaaaaaaaaaaaa 33333333333333 iiiiiiiiiiiinnnnnnnnnnn fffffffffffrrrrrrrrrrrooooooooooonntttt ooooooooooooffffffffffff tttttttttthhhhhhhhe H atttttoooooooooooommmmmmmmmmmmmmmmmmm oooooonnnnnnn ttttttttttthhhhhhhhhhheeeeeeeee lefffffffffftttttttttt sssssideeeeeeeeee,,,,, it increases thee HHHHHHHHHHHHHHHHH aatttttttttttttooooooooooooommmmmmmmmmmmmmmmmmmsssssssssssssss ooooooooooooonnnnnnnnnnnnnnn tttttttttthhhhhhhhhhhhheeeeeeeeeeee llllllllleeeeeeeeeeeefffffffffffffttttttttt sssssssssssssiddddddddeeeeeeeeee ooooooooooooofffffffff the equuuuuuaaaaaaaaaaaatttttttttttiiiiiiiiiiiiooooooooooooonn ttttttttttttttoooooooooooooo 66666666, wwwwwwwwhhhhhhhhhhhhhhhhhiiich makes it eqqqqqqqqqqqqqqqquuuuuuuuuuuual tttttttttttoooooooo ttttttttttthhhhhhhhhhhhhhhhhhhhheeeeeeeeeeeeeeee nnnnnnnnnnnnnuuuuuuuuuuuummmmmmmmmmmbbbbbbbbbbbbber of HHHHHHHHHHH aaaaaaaaaaaatttttttttttttoooooooooommmssssssssssss ooooooooooooonnnnnnnnnnnnnnn the riiggggggghhhhhhhhhhhhhhhhhhhttttttttttt ssssssssideeeeeeee... 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It telllllllllllllllllllsssssssssss uuuuuuuuuuusssssssss ttttthhhhhhhhhhhhhhhaaaaaaaaaaaaaattttttttttt 111111 mmmmmmmmmmmoooooooooooooolllllllllllecule of nitrogen ccccccccccccoooooooooombbbbbbbbbbbbbbbiiiiiiiiiiiiiiinnnnnnnnnnnnnneeeeeeesssssss wwwwwwwwwwwiiiiiiiiiiiiiiittttttttttttttthhhhhhhhhhhhhhhhhh 33333333 mmmmmmmmmmmmmmmoooooooooolllllllllllecccccccccccccuuuuuuuuuuuullllllllleeeeeeeeeess ooooooooofffffffffffff hhhhhhhhhhhhhhhhhyyyyyyyyyyyyyyydrogennnnnnn ttttttttttttoooooooooooo ppppppppppppprroooooooooooodddddddddddddduce 2 molecules of aammmmmmmmmmmoooooooooooonnnnnnnnnnnnnnnniiiiiiiiiiaaaaaa.....There are two atoms of nittttrrrrrrrrrrrrrooooooooooogggggggggggeeeeeeennn and hhhyyyyyyyyyydddddddddddrrrrrrrrrrrooooooooooogggggggggggggggeeeeeeeeeennnnnnnnnnn ooooooooooonnnnnnnnn tttttttthhhhhhhhhhe lleft sidddddddddddddddddeeeeeeeeeeeeeeeeeee aaaaaaaaaaaaannddddddddddddddd one nitrogen atom and thrrrrrrrreeeeeeeeeeeeeeeeeeeeee hhhyydddddddddddddrrrrrrrrrrrroooooooggggggggggggggeeeeen atoms on the right sssssiiiiiiiiiiiidddddddddddddeeeeeeeeeee.. +A BC+++++++++++AAAAAAAAAABBBBBBBBBBBBCCCCCCCCCCA BBBBBBBBBAAAAAAAABBBBBBBBCCCCCCCCCreactantttttsssssssssssssssproducttttttttttttttttsssssssssssmass of reactants ============ mmmmmmmmmmmmmmaaaaaaaaaaaaaassssssssssssssssssssssssssssss of produucccccccccccccttttttttttttttttssssssssssssss222222222222223reacttaaaaaaaaaaaannnnnnnnnnnntttttttttttttssssssssssssssssproductsAAAAAAAAAAAAAAAAllllllllll44444444444444 AAAAAAAAA4 Al2 OOOOOOOOOOOOOOO6 O223rrrrrrrrrrrreeeeeeeeeeeeeaaaaaaaaaaaacccccctantsproducts4444444444 Al4 Al6 O6 O2222222222222222222222223223reactantsproducts2 N2 N 2 H6 H 223reactantsproducts2 N2 N6 H6H H111111111 NNNNNNNNNNNNNNNiiiiiiiitttttttttttrrrrrogenmmmmmmmmmmmmmmmooooooooooooooleccccuuuuuuuuuuuuullllllllllllllleeeeeeeeeeeee3 Hydrogenmoleculeesssssssssssss2 Ammoniamolecules
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