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CHEM 115 Formulas

by: Ashley Notetaker

CHEM 115 Formulas Chem 115

Ashley Notetaker
GPA 3.3

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About this Document

This guide has all of the formulas used on the CHEM 115 mid-term.
General Chemistry
Study Guide
50 ?




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This 2 page Study Guide was uploaded by Ashley Notetaker on Thursday January 21, 2016. The Study Guide belongs to Chem 115 at Indiana University Purdue University - Fort Wayne taught by Dr.Berger in Winter 2016. Since its upload, it has received 24 views. For similar materials see General Chemistry in Science at Indiana University Purdue University - Fort Wayne.


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Date Created: 01/21/16
Temperature Conversion Formulas: K= C+273.15 C= K­273.15 C= 5/9 (F­32) F= 1.88C+32 Density: D= (mass)/(volume) Finding Mass Number: A= Z+N; where A is the mass number, Z is the atomic number, and N is the number of neurons  in the nucleus. Formula Weight: Sum of atomic weights, given in amu. Molar Mass= Atomic Weight 1 mole= Atomic Weight in grams= Avogadro’s Number of atoms (6.022*10 ) 23 Mass Percentage: Mass % of A= (mass of element A)/(total mass of compound) Molecular Formula=(empirical formula)n Yields: Percent Yield= (actual yield)/(theoretical yield)* 100 Molarity: M= (moles of solute)/(volume of solution in L) Moles of Titrant: Moles of T= M*T t t nT+ xA  products moles of T * (x mol A)/(n mol T)= moles of A Gas Laws: Boyle’s Law­ P V1=P1V 2 2 Charles’s Law­ (V /T )1(V1/T ) 2 2 Combined Gas Law­ (P V )/(T 1= 1P V 1/(T ) 2 2 2 Ideal Gas Law­ PV=nRT Partial Pressure Law­ P V=n aT a P(dry gas)= P(observed gas)­ vapor pressure Kinetic Energy: 2 E k (1/2)mv ; where v is speed. U is subsitituted for v when there are more variables: 2 2   Ek1 (1/2)mu   E1= (1k2)mu ; where2the average would be the sum of the equations divided by the amount of equations. E kavg)= (3/2)kT; for larger collections of molecules where T is the absolute temperature and k  ­23 is the constant 1.381*10  J. Graham’s Law­ (Rate of gas 1)/(Rate of gas 2)= ( √ M mof gas 2)/( √M om gas 1) Van der Waals Equation­ [(P+(n a/V )](V­nb)=nRT


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