UNIT 11: Work, Power & Simple Machines



Chemical FormulasChemical FormulaCoefficientSubscriptCoefficient & SubscriptsUsing parenthesesSubscripts in and out of parenthesesCoefficients with Parenthesesa combination of symbols and numbers that indicate the type and amount of atoms in a substanceEx: carbon monoxideC – 1COO – 1a number before a chemical formula indicating the number of particles of a substanceEx: table saltNa – 1616 NaClCl – 16No Coefficient = 1“under writing”a number after an atom in a chemical formula indicating the number of that type of atomEx: waterH – 2H2OO – 1No Subscript = 1CompoundFormula# Atoms of Each ElementCarbon DioxideCO2C-1O-2SugarC6H12O6C-6H-12O-6Copper SulfateCuSO4Cu-1S-1O-4Baking SodaNaHCO3Na-1H-1C-1O-3Ex: 16 CO2C - 16O - 32multiply coefficients x subscriptsEx: 4 K2SO3 K - 8S - 4O - 12Ex: 5 NaHCO3 Na - 5H - 5C - 5O - 15Ex: Ba(OH)2Ba - 1O - 2H - 2( )# ← applies to everything insideEx: Al2(SO4)3 Al - 2S - 3O - 12multiply subscripts inside and outside parenthesesEx: 4 Al2(SO4)3 Al - 8S - 12O - 48Summary:Describe the parts of the following chemical formula. Also count the number of atoms of each element2 Mg3(PO4)2 ................
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