# How to Calculate Percent Abundance?

If you're referring to atomic percent in chemistry, you need to divide the number of atoms in the molecule or compound molecule by the atoms of each substance and multiply by 100. If you're calculating abundance by mass (the more likely scenario) by atomic weights. You can find atomic weights on any periodic table.
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 1. Determine the element's average atomic mass number using the periodic table of the elements. This will be a number with several decimal places behind it. This value is the average http://www.ehow.com/how_8267267_calculate-percent-...
 after inspection of fabric based on 4 point system how to calculate the % of fabric pass or fail http://wiki.answers.com/Q/Example+sample+for+calcu...
 Percent Abundance is used in Chemistry. If you take percent abundance times atomic mass for each isotope then add all up for average atomic mass. http://answers.ask.com/Science/Chemistry/what_is_p...
 Pretend that you have a 100. g sample of rubidium. 27.8 g would be Rb-87 27.8 g/(87 g/mol) = 0.31954023 mol 72.2 g would be Rb-85 72.2 g/(85 g/mol) = 0.849411765 mol Total mass is http://answers.yahoo.com/question/index?qid=200912...
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Calculating the percentage abundance of each isotope in chemistry can be tricky. In chlorine there are two naturally occurring isotopes. You can find more information ...
1. Use a mass spectrometer to test an element or compound, according to the device's manual. 2. Look at the relative abundance on the mass spectrometer's output. ...
Percent Abundance is a common term used in Chemistry.It is used to calculate the percentage of compounds in Isotopes.In simple terms, it is part of Compound B ...