Helllppp i have a test A compound has a molar absorptivity of 40.9 cm ^ - 1 * M ^ - 1 at 293 nm. If a 1.00 cm cuvette is used, and the absorbance found to be 0.111, what is the concentration of the sample ?

0.00271 M

Explanation:

To solve this problem we can use the formula:

Where A is the absorbance, ε is the molar absorptivity, C is the molar concentration and l is the optical path length.

We input the data given by the problem:

And solve for C:

the answer

explanation:

the capillary tube was too close to the bottom of the beaker.

the ruler may have moved.

water got into the capillary tube.

the temperature was not allowed to equilibrate in the 2-4 minutes.