Out of the choices given, Keratin is most likely a protein polymer. The correct answer is D.
Answer :
(7) When phenolphthalein is added to the solution of pH 10 (basic) then the color will be pink.
(8) When the litmus is blue in a solution that means the solution is basic in nature.
(9) The range of methyl orange is 3.2 - 4.4 (red-yellow).
The range of bromothymol blue is 6.0 - 7.6 (yellow-blue).
Explanation :
Part 7:
As the phenolphthalein is a synthetic indicator which is used to detect color change when an acid and a base is added to it. The neutral color of phenolphthalein is colorless.
Phenolphthalein indicator is colorless in acidic solution.
Phenolphthalein indicator gives pink color in basic solution.
When phenolphthalein is added to the solution of pH 10 (basic) then the color will be pink.
Part 8:
As the most common indicator used in the laboratory for testing acids and bases is litmus paper.
Litmus paper is of two types which are blue litmus and red litmus.
As the solution is acidic in nature then the litmus paper turns blue to red and as the solution is basic in nature then the litmus paper turns red to blue.
According to the question, when the litmus is blue in a solution that means the solution is basic in nature.
Part 9:
The range of methyl orange is 3.2 - 4.4 (red-yellow).
The range of bromothymol blue is 6.0 - 7.6 (yellow-blue).
<span>8.13 g x 1 mol/126 g = 0.065 moles
0.065 mol/x L = 0.86 M
x = 0.075 liters = 75 mls volume of solution</span>
Shorthand notations are a part of the Wolfram Language's rich syntax system that allows multiple ways to feed arguments to functions. In addition to creating compact code, using shorthand notation lets you customize your workflow in the Wolfram Language.
<h3>What is the shorthand notation of an atom?</h3>
Often, a shorthand method is used that lists only those electrons in excess of the noble gas configuration immediately preceding the atom in the periodic table. For example, sodium has one 3s electron in excess of the noble gas neon (chemical symbol Ne, atomic number 10), and so its shorthand notation is [Ne]3s1.
<h3>How do you write shorthand configuration?</h3>
In shorthand electron configuration, the electron configuration starts with the symbol of the noble gas in the previous period, followed by the additional configuration of the electrons for the given element. For example, aluminum has the atomic number 13, which is the number of protons in the nuclei of its atoms.
Learn more about shorthand notation here:
<h3>
brainly.com/question/14177699</h3><h3 /><h3>#SPJ4</h3>
Temperature creates more energy which increases movement thus causing it to speed up the reaction