Chapter 14 Notes

# Chapter 14 Notes - Each element in the periodic table is...

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Each element in the periodic table is assigned an atomic mass. One atomic mass unit (u) is exactly one-twelfth the mass of an atom of carbon-12. The molecular mass of a molecule is the sum of the atomic masses of its atoms. The number of moles n contained in a sample is equal to the number of particles N (atoms or molecules) in the sample divided by the number of particles per mole N A , n = N / N A , where N A is Avogadro's number and has a value of N A = 6.022 × 10 23 particles per mole. The number of moles is also equal to the mass of the sample (expressed in grams) divided by the mass per mole (expressed in grams per mole). The mass per mole of a substance has the same numerical value as the atomic or molecular mass of one of its particles. The ideal gas law relates the absolute pressure P , the volume V , the number of moles n , and the Kelvin temperature T of an ideal gas according to PV = nRT , where R = 8.31 J/ (mol · K) is the universal gas constant. An alternative form of the ideal gas law is
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## This note was uploaded on 04/09/2008 for the course PHYS 101 taught by Professor Sharp during the Spring '08 term at Ohio State.

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