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Chem 152 Formulas
Summer 2010
33
Chemistry
Undergraduate 2
06/16/2010

Additional Chemistry Flashcards

 


 

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Term
Molarity
Definition

Moles Solute

Liters Solution

Term
Molality
Definition

Moles Solute

Kg Solvent

Term
Percent By Mass
Definition

  %  =    Mass of Solute        x 100

                        Mass of Solution

Term
Mole Fraction
Definition

      X = Mole of Solute or Interest     

             Moles of Solute + Mole Solvent

Term
Vapor Pressure
Definition

Pcomp. = Xcomp. PO (inital)

 

 

Pc = expected pressure in solution    

Xc = mol fraction of compound         

PO = pressure of comp. in pure state

 

Term
Boiling Point Elevation
Definition

ΔTb = Kbm

 

ΔTb = change in b.p elevation            

Kb = b.p elevation constant               

m = molality of solution                   

Term
Molar Mass
Definition

Grams

Moles

Term
Freezing Point Depression
Definition

ΔTf = Kfm

 

ΔTf = change in f.p elevation

Kf = f.p elevation constant   

         m = molality  

Term
Osmotic Pressure
Definition

π = MRT

 

 

M = molarity         

R = gas constant   

T = temp. in kelvin

Term
Alkane General Formula
Definition
CnH2n+2
Term
Cycloalkane General Formula
Definition
CnH2n
Term
Alkene General Formula
Definition
CnH2n
Term
Cycloalkene General Formula
Definition
CnH2n-2
Term
Alkyne General Formula
Definition
CnH2n-2
Term
Aromatic Hydrocarbon General Formula
Definition
CnHn
Term
Benzene
Definition

 

 

O

 

Term
Aniline
Definition

 

NH2

O

Term
Toluene
Definition

 

CH3

O

Term
Phenol
Definition

 

OH

O

Term
Benzoic Acid
Definition

 

COOH

O

Term
Carboxyl or Acid Group
Definition
COOH
Term
Amine Group
Definition
NH3
Term
Hydroxyl or Alcohol Group
Definition
OH
Term
Carbonyl Group
Definition

O=C

double bond

 

Ketones = doube bond on interior carbon     

Aldehyde = double bond on terminal carbon 

Term
Alpha α
Definition

Particles are Helium nuclei

 

Designated as:  42He

 

 

Term
Beta β
Definition

Particles are Electrons

 

Designated as:  -10e

 

(neutron is converted to a proton and a electron)

Term
Gamma γ
Definition

Particles are high energy Photons

 

Designated as:  γ

Term
Electron Capture
Definition

electron + proton = neutron

 

When an Electron is captured by the nucleus from its orbital and is combined with a proton to form a neutron.

 

 

Term
Positrons
Definition

Positively charged particles with the same mass as electrons.

 

Designated as:   10e

Term
Energy Calculation
Definition

E=mc2

 

E = energy                      

m = mass                        

c = speed of light constant


(Mass converted into energy = loss of mass)

Term
1 Joule
Definition

1 Joule = Kgm2 / s2

 

1 J. = 4.184 cal

Term
Rate of Decay Formula
Definition

Rate = KA

Rate = ΔA

           Δt

 

ln At - ln Ao = -Kt

(y = mx + b form. Slope of line = -k)

 

K = rate constant for a particular isotope

A = amount of isotope in sample            

t = time                                              

Term
Half Life Formula
Definition

t1/2 = 0.693

        k

 

also

 

k = 0.693

        t1/2

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