A specific steroid has a λmax of 282 nm and a molar absorptivity ε of 11 , 500 L mol − 1 cm − 1 . What is the concentration of the compound in a solution whose absorbance at 282 nm is A = 0.060 with a sample pathlength of 1.00 cm ?

The molar concentration of the compound is 5.2 x 10⁻⁶ M

Explanation:

According to Beer-Lambert law the concentration of the sample and the sample path length have a linear relationship with the light absorbed at a particular wavelength.  

This problem can be solved by this equation, which is as follows,

A =  ε.b.C

Here,  A is the absorbance, ε is the molar absorptivity, b is the sample path length and C is the molar concentration

0.060 = 11500 x (1) x C

C = 5.2 x 10⁻⁶ M

Words used by Tennyson to show the fate of the brigade are:

valley of Death

Explanation:

The poem   "The Charge of the Light Brigade." is about a small brigade of barely 600 men who fight a battle in impossible matter of chance and know that they might be putting up their last stand on the fight.

The doom of their situation is thus conveyed masterfully by Tennyson here in this rhyme of valor and pride.

It is in these words whee the site of the battle is called the valley of death that we learn what the fate of the persons fighting is going to be and thus this is the phrase that signals their doom.