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First 9 Weeks Review

Sodium Na
Chlorine Cl
Hydrogen H
Oxygen O
Carbon C
Nitrogen N
Table Salt NaCl
Water H O 2
Sugar C H O 6 12 6
Oxygen O 2
Carbon Dioxide C O 2
Photosynthesis Reactants 6CO + 6H O 2 2 Carbon + water + light energy Dioxide
Photosynthesis Products C H O + 6CO 6 12 6 2 glucose + Oxygen
Respiration Reactants C H O + 6O 6 12 6 2
Respiration Products 6CO + 6H O + energy 2 2
The law of conservation of mass mass of reactants and products are the same. The number and kind of atoms must be the same on the reactants and products side of an equation.
Balance Chemical equations: (1)count the number of atoms for each element on the product and reactant side. (2)Pick an element that is not equal on both sides of the equation. (3)Add coefficients to get the same number of atoms of elements on each side.
If you are finding a missing mass for an equation: (1)Add the two masses that are given on one side of the equation and subtract the one mass you know on the other side. This will give you the mass that is unknown.
Created by: mgrant