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den301095 [7]
1 year ago
12

Find if the example is correct or not and explain using CER please. Will give 5/5

Chemistry
1 answer:
ELEN [110]1 year ago
5 0

The Lewis structure the student drew is incorrect. The total number of electrons in bonds and lone pairs is equal to the total number of valence electrons available, then a valid Lewis structure is produced.

The correct structure is the following:

The structure that was drawn by the student was incorrect because the total number of electrons around Oxygen were incorrect, there were 6 instead of 8, which was against the octet rule. The correct structure should have 8 electrons around each atom.

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Stella [2.4K]

Answer:

COol

Explanation:

Answer A

7 0
3 years ago
What is the pH of a 0.28 M solution of ascorbic acid (Vitamin C)? (The values for Ka1 and Ka2 for ascorbic acid are 8.0×10−5 and
Tomtit [17]

Answer:

pH = 2.32

Explanation:

H2A + H2O -------> H3O+ + HA-    

Ka2 is very less so i am not considering that dissociation.

now Ka = 8.0×10−5

            = [H3O+] [HA-] / [H2A]

lets concentration of H3O+ = X then above equation will be

8.0×10−5 = [X] [X] / [0.28 -X]

8.0×10−5 = X2 /  [0.28 -X]

X2 + 8.0×10−5 X - 2.24 x 10−5

solve the quardratic equation

X =0.004693 M

pH = -log[H+}

    = -log [0.004693]

    = 2.3285

    ≅2.32

pH = 2.32

5 0
3 years ago
The overall reaction for photosynthesis can be represented by the following equation:
Svet_ta [14]

B & C

Explanation:

Because the forward reaction results in a positive change in enthalpy, this reaction is endothermic – it takes energy from the environment. Therefore, the forward reaction will be favored if there are an increase n temperatures

Forward and reverse reactions are usually balanced. Removing a product (C6H12O6 in this case) as it is formed, favors the forward's reaction.  This is because the process that results in a reduction in pressure of the system is favoured in the reaction.  

4 0
4 years ago
What is the molar mass of magnesium chloride
aleksandr82 [10.1K]

95.21 grams.

Add the atomic mass of each element present. (If there is more than one atom of an element, multiply the element's atomic mass by the number of that element's atoms.)

8 0
4 years ago
What percent of Earths feshwater is found as a solid?
Zanzabum

Answer:

68.7% is the percent of frozen freshwater.

4 0
3 years ago
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