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Cards In This Set
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Mole
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6.022*10^23 atoms
Avogadro's number |
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A silver ring contains 1.1*10^22 silver atoms. How many moles of silver are in the ring?
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1.8*10^-2 mol Ag
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Molar Mass
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The mass of one mole of atoms
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The molar mass of an element is numerically equal to the element's...
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Atomic mass, in amu
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Calculate the Moles of Carbon in 0.0265 g of pencil lead
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2.21*10^-3 mol C
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How many copper atoms are in a penny weighing 3.10 g?
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2.94*10^22 atoms of Cu
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How many moles are in 50.0 g of PbO2? (Pb= 207.2, O= 16)
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.209
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Calculate the moles of oxygen in 1.7 moles of CaCO3
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5.1 mol of O
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Percent composition
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Percentage of each element in a compound
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Percent composition is determined from...
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The formula of the compound
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Percent composition equation
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Mass of element x in 1 mol/ mass of 1 mol of the compound*100%
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Calculate the percent composition of Cl in C2Cl4F2
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69.58%
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Finding an empirical formula
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1. convert % -> g
2. convert g -> mol 3. write pseudoformula 4. divide all by smallest # 5. multiply all mole ratios by # to make all whole |
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Determine the empirical formula of stannous fluoride, which contains 75.7% Sn (118.70 g) and the rest fluorine (19.00 g)
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SnF2
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Molecular formulas
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A multiple of the empirical formula
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