The hydronium ion concentration of the solution with given value of pOH is 7.94 × 10⁻⁸M.
Option D) is the correct answer.
<h3>What is pH of solution?</h3>
The pH of a solution is defined as the logarithm of the reciprocal of the hydrogen ion concentration [H+] of the given solution.
From the formular;
pH = -log[ H⁺ ]
pH + pOH = 14
Given that;
- Hydronium ion concentration OH⁻ = ?
First we find the pH
pH + pOH = 14
pH + 6.90 = 14
pH = 14 - 6.90
pH = 7.1
Now, from the above expression;
pH = -log[ H⁺ ]
Hence;
[ H⁺] = 10^(-pH)
[ H⁺] = 10^(-7.1)
[ H⁺] = 7.94 × 10⁻⁸M
Therefore, the hydronium ion concentration of the solution with given value of pOH is 7.94 × 10⁻⁸M.
Option D) is the correct answer.
Learn more about pH & pOH here: brainly.com/question/17144456
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Auroras are a sign that the sun and earth are connected by more than sunlight, they indicate that something is happening in space. The aurora forms when charged particles emitted from the sun during a solar flare penetrate the earths magnetic shield and collides with the atoms and molecules in our atmosphere.
Answer:
Acceleration
Explanation:
Speed is how fast something moves.
Velocity is how fast it moves and in what direction it moves in.
Acceleration is the change in how fast it moves. I.e. if it speed up or slows down.
Here we are not given a speed, but we are told that Usain Bolt can increase it (change it) faster than any other runner which means we have been given a change in speed (acceleration, speeding up), therefore it is acceleration.
Hope this helped!