calculating percent yield chapter 10.3 intro to percent composition the number of percent values in...
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Calculating Percent Yield
Chapter 10.3
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Intro to Percent Composition
The number of percent values in the percent in the percent composition of a compounds is many as there are different elements in the compound
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Which has a higher percent of chromium (Cr)?
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Percent Composition
You can use percent composition to calculate the number of grams of an element in a given amount of a compound.
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Empirical Formula
An empirical formula of a compound gives the simplest whole number ratio of the atoms of the elements in a compound
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Empirical Formula
Empirical Formula ≠ Molecular Formula
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Example
Empirical Formula: CH
C2H2
C4H4
C6H6
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Fill in the labels
oxygen
6.02 x 1023
3 6.02
1
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Molecular Formula
The molecular formula of a compound is either the same as its empirical formula or a whole number multiple of it.
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Empirical Molecular
In order to calculate the molecular formula, you must know the compound’s molar mass
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Empirical Molecular
If you divide the molar mass of a compound by the empirical formula mass you get the number that you will multiply the subscripts by