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ra1l [238]
2 years ago
11

Question 3 When the population size decreases over time, the total number of births the total number of deaths. O less than O eq

uals O greater than​
Chemistry
1 answer:
Neporo4naja [7]2 years ago
4 0
The population decreases when the birth rate is less than the death rate.
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What is mutualism? Give two<br> examples.
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A woman is brought into the emergency room experiencing nausea and vomiting. She is also hyperventilating. She says that she ing
Keith_Richards [23]

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>

3 0
3 years ago
Which solution, solution X of pH 9.4 or solution Y of pH 7.5, is more acidic? Which solution, solution of 9.4 or solution of 7.5
zzz [600]

Answer:

Solution Y is more acidic

Explanation:

The pH value is an indicator of the concentration of hydrogen ions (H⁺) in an aqueous solution, and it is defined as:

pH= -log [H⁺]

⇒ [H^{+} ]= 10^{-pH}

Where  [H⁺] is the concentration of H⁺. A solution with a higher concentration of H⁺ is more acidic, and a solution with a lower concentration of H⁺ is less acidic or basic.

As result, <em>the lower the pH, the more the concentration of hydrogen ions ([H⁺]), and the aqueous solution is more acidic</em>.

Solution Y has a lower pH value (7.5) than solution X (9.4). So, solution Y is more acidic.

8 0
3 years ago
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