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Basile [38]
3 years ago
9

In a water molecule (H2O), the oxygen atom has two unshared pairs of electrons and two bonding pairs of electrons. How do the un

shared pairs affect the bond angle?
Chemistry
1 answer:
vladimir1956 [14]3 years ago
4 0

Answer:

They reduce the bond angle to be slightly lower than the tetrahedral bond angle, approximately 104.45 degrees.

Explanation:

The unshared pair of electrons or lone pair electrons in order to have the minimum repulsion possible with each other pushes the other bonding pairs closer together making the bond angle smaller or bent.

The bond angle is slightly lower than the tetrahedral bond angle of 108 degrees, leaving the water molecule with a bent molecular geometry.

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Answer:

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Explanation:

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3 0
3 years ago
Calculate the hydrogen-ion concentration [H+] for the aqueous solution in which [OH–] is 1 x 10–11 mol/L. Is this solution acidi
Pepsi [2]
POH = -log [OH-]
pOH = - log (1 x 10^-11)
pOH = -(-11) = 11

pH + pOH = 14
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6 0
3 years ago
Read 2 more answers
The elemental mass percent composition of ascorbic acid (vitamin C ) is 40.92% C , 4.58% H , and 54.50% O . Determine the empiri
Lady bird [3.3K]

The empirical formula of ascorbic acid is C6H8O6.

<h3>Empirical formula</h3>

To calculate the empirical mass of a compound from the mass percentage of each element, the value of the<u> molar mass </u>of each element is used, which in this case corresponds to:

                                              MM_C= 12g/mol\\MM_H=1g/mol\\MM_O=16g/mol

From this, we consider that the compound has 100 grams, so the number of moles of each element will be equal to:

                                                   C = \frac{40.92}{12} = 3.41 \\H = \frac{4.58}{1}=4.58\\ O =\frac{54.50}{16}=3.41

Now, divide all the values ​​found by the <u>smallest value</u>, to find the amount present in each element:

                                            C = \frac{3.41}{3.41} = 1\\ H =  \frac{4.58}{3.41} = 1.34\\O =  \frac{3.41}{3.41} = 1

As you can see, the value of moles of hydrogen resulted in a decimal number, so it is necessary to multiply all values ​​​​by a number in common until the three meet as integers:

                                          C = 1 \times 6 = 6\\H = 1.34 \times 6 = 8\\O = 6 \times 6 = 6

So, the empirical formula of ascorbic acid is C6H8O6.

Learn more about empirical and molecular formula in: brainly.com/question/11588623

7 0
3 years ago
Need help on 12,13,14 ONLY IF YOU ARE POSITIVE!!
Marina86 [1]

Answer:

12. C

13. C

14. A

I hope it helps you

Follow me

4 0
3 years ago
1. which volume has the most uncertainty associated wit the measurement?
Mamont248 [21]
1. The option a. 10 mL has the most uncertainty associated with it, because it has only 2 significative figures, while 10.0 mL has three significant figures and 10.00 has four significant figures.

2. The volume of solution that remains is 145.675 mL - 24.2 mL = 121.475 mL rounded to one decimal  = 121.5 mL, given that the measure with the most uncerntainty has only one decimal.
 

 
4 0
4 years ago
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