Answer: Answer is D, water
Explanation: Water is the correct option among all and other options like sugar, oxygen and ATP are the products of the photosynthesis. Water is required along with other reactants to produce these products.
There are 2 significant figures. All numbers in a whole number are significant.
Answer:
Molar concentration is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of amount of substance per unit volume of solution. In chemistry, the most commonly used unit for molarity is the number of moles per liter, having the unit symbol mol/L or mol/dm³ in SI unit.
Answer:
Protonated form: 96.87%
Unprotonated form: 3.13%
Explanation:
To find the percentage of protoned and unprotoned forms of salicylic acid we must use Henderson-Hasselbalch equation:
pH = pKa + log [A⁻] / [HA]
<em>Where pKa of salicylic acid is 3.49; [A⁻] is the unprotonated form and [HA]:</em>
<em />
2.0 = 3.49 + log [A⁻] / [HA]
0.03236 = [A⁻] / [HA] <em>(1)</em>
And as:
[A⁻] + [HA] = 100% <em>(2)</em>
<em></em>
Replacing (2) in (1):
0.03236 = 100 - [HA] / [HA]
0.03236 [HA] = 100 - [HA]
1.03236[HA] = 100
<h3>[HA] = 96.87%</h3>
And [A⁻]:
[A⁻] = 100 - 96.87
<h3>[A⁻] = 3.13%</h3>
<em></em>
