Chemistry

Problem

A least-squares analysis of absorbance data for a dye yields the equation

A = 42.0\,c + 0.022,

where

A

is absorbance (unitless) and

c

is concentration in mol L

^{-1}

. A sample of the dye shows an absorbance of 0.433 in a 1.00 cm cuvette at the same wavelength. What is the concentration of the sample? a)

4.2 \times 10^{-2}\,\text{mol L}^{-1}

9.8 \times 10^{-3}\,\text{mol L}^{-1}

1.0 \times 10^{-2}\,\text{mol L}^{-1}

1.1 \times 10^{-2}\,\text{mol L}^{-1}