Answer: 5
Explanation: Arsenic, As, has 5 electrons in the 4th energy shell. 4s^2 and 4p^3. The electrons being added for the elements scandium through zinc are all going into the 3d orbital, in the 3rd energy shell. They don't count, since valence electrons are only those in the highest energy level, 4 in this case.
Calculate the pOH first :
pOH =14-8.57=5.43
(OH)=10^-5.47
(OH)=3.72 x 10^-6 mol/L
Freezing point is defined as the temperature needed for a liquid to turn into a solid and a melting point is the temperature needed for a solid to become a liquid. Sodium Chloride has a lower freezing point than water, as such when it is added to icy roads it helps to melt the ice faster by lowering the melting point of the water making it turn into a liquid faster/easier even if it is "cold" outside.
The number of turns that citric acid cycle will turn when 57.3 g of glucose (C6H1206) is oxidized in the cells is 1.92 × 10²³ turns.
<h3>How to calculate number of turns?</h3>
According to this question, Acetyl CoA turns the citric acid cycle one turn.
First, we find the number of moles of 57.3 grams of glucose by dividing by its molar mass of 180g/mol.
no of moles = 57.3/180 = 0.32moles
Next, we multiply the number of moles by Avogadro's number i.e. 6.02 × 10²³ molecules.
no of turns = 6.02 × 10²³ × 0.32
no of turns = 1.92 × 10²³ turns
Therefore, the number of turns that citric acid cycle will turn when 57.3 g of glucose (C6H1206) is oxidized in the cells is 1.92 × 10²³ turns.
Learn more about no of turns at: brainly.com/question/1747943
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