Question #dfb1a

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Michael
Jan 26, 2015

The molar absorptivity of molecule X is given by #epsilon=4.5xx10^3M^(-1)cm^(-1)#

The Beer - Lambert Law states:

#A=epsilonlc#

#A# = absorbance

#l# = path length in cm

#c# = molar concentration

#epsilon# = molar absorptivity

Rearranging gives:

#epsilon=(A)/(lc)#

#epsilon=(0.350)/(0.850xx90xx10^(-6)) = 4.5xx10^(-3) M^-1cm^-1#

Note I converted #muM# to #M# by multiplying by #10^-6#

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