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3
...
H2
2
...
O2
4
...
Cl2
6
...
Br2
3
...
3: Chemical Equations
Chemical Equation: chemical symbols used to represent a chemical reaction
Reactant: a substance that is consumed in a chemical reaction
Product: a substance that forms in a chemical reaction
Aqueous: dissolved in water
Δ = heat
Stoichiometric Coefficients: the numeric values written to the left of each species in a chemical
equation to balance the equation
*We cannot add reactants or products to the chemical equation for the purpose of balancing it
...
*To balance…
1
...
2
...
3
...
Combustion: burning in air
3
...
) as there are atoms in exactly 0
...
022 * 1023
Molar Mass ( ): the mass in grams of 1 mole of the substance (g/mol) (add up all of the
atomic masses of each element in the compound (make sure to multiply it by how many of each
element is in the compound)
1 amu = 1
...
022 * 1023amu
*The molar mass (in grams) of any compound is numerically equal to its molecular or formula
1 g = 6
...
5: Combustion Analysis
Combustion Analysis: an experimental determination of an empirical formula by a reaction
with oxygen to produce CO2 + H2O
3
...
≏ - means “is stoichiometrically equivalent to” or “equivalent to”
*=
Stoichiometric Amounts: quantities of reactants in the same relative amounts as those
represented in the balanced equation
3
...
Percent Yield: the ratio of actual yield to theoretical yield multiplied by 100%