Problema Solution
the absorbance varies directly with the concentration of an unknown substance, and the absorbance is 0.3 when the concentration is 100 mg/dL. find the absorbance when the concentration is 300 mg/dL
Answer provided by our tutors
a directly proportional to c
so a = cx
a=0.3
c = 100
0.3/100 = x/300
90/100 = x
x = 0.9 --> the absorbance at c = 300