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17 Cards in this Set
- Front
- Back
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What is Avagadro's number?
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6.02 x 10^23
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How do you determine the molar mass of a compound?
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You look at the periodic chart
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How do you go from grams to moles?
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Molar mass
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How to you go from particles to moles?
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Avagadro's number
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How do you find the percent composition of an element?
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Find total molar mass, and divide into molar mass of the element
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How do you find how many grams are in a compound?
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-Find % composition of the element
-Multiply by the number of grams given |
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What is a molecular formula?
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Exactly what/how many of each atom in a compound
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What is an empirical formula?
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Smallest whole number ratio of the atoms in a compound
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How do you find the empirical formula of a compound?
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-Find number of moles of each element
-Divide the moles by the smallest value in step #1 -Multiply ratios by a common number to get the lowest whole number ratio (rounding) |
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How do you take empirical formulas a step further and find the molecular formulas?
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-find the mass of the empirical formula
-divide the molar mass by em. formula mass -increase em. by answer in #2 |
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How do you find the volume of gas at STP?
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Use 22.4L=1mol ratio
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What is concentration?
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Lots of moles is highly concentrated
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What is the solute
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The thing being dissolved
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What is the solvent
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Dissolves the solute
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What is a solution
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The solvent and the solute together
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What is very important para el examin?
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ADD ACID TO WATER
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What is the dilutions formula?
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M1V1=M2V2
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