Protein x has an absorptivity of 0. 4 ml·mg-1 ·cm-1 at 280 nm. What is the absorbance at 280 nm of a 2. 0 mg ·ml-1 solution of protein x? (assume the light path is 1cm).

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .

Is there an image with it

Answers are 1,2,4 its correct on edgenuity.

#2- the hno3 has a h+ ion and the naoh has an oh- ion