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Yanka [14]
3 years ago
10

BRAINLIESTTT ASAP!!! PLEASE HELP ME :)

Chemistry
2 answers:
djyliett [7]3 years ago
3 0

They are stronger than hydrogen bonding forces.

Helen [10]3 years ago
3 0

Answer:

They are stronger than hydrogen bonding forces.

Explanation:

A dipole is formed when there is electronegative difference between the two atoms, such that one atom acquires a partial negative charge and the other acquires a partial positive charge. In a hydrogen bond a hydrogen atom is bond to a more electronegative atom. Both dipole-dipole forces and hydrogen are intermolecular forces. However, dipole dipole forces are stronger than hydrogen bonds. Hence option A is correct.

Dipole-dipole forces are stronger than hydrogen bonds. Hence option B is incorrect.  

Ion-dipole forces are formed between ions and polar molecules. Hence option C is incorrect.

Dipole-dipole forces occur between atoms hat are bond to each other wherein the atoms have a electronegative difference between them. Hence option D is incorrect.

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Answer:

It is a satellite that collects data about rain and snow.

• Its orbit covers 90 percent of Earth's surface.

• The sensors measure microwaves.

Explanation:

Correct on edge

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3 years ago
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6. What parts of a nuclear reactor keep the reaction from
Shalnov [3]

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B. control rods and moderators

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How do chemical weathering and physical weathering affect each other?
Zinaida [17]
Both processes occur in place. No movement is involved in weathering. Chemical weathering involves a chemical change in at least some of the minerals within a rock. Mechanical weathering involves physically breaking rocks into fragments without changing the chemical make-up of the minerals within it.
7 0
3 years ago
A phosphate buffer is involved in the formation of urine. The developing urine contains H2PO4 and HPO42- in the same concentrati
Katen [24]

Answer:

The ionization equation is

H_{2}PO_{4}^{-}  +H_{2}O ⇄HPO_{4}^{-2}  +H_{3}O^{+} (1)

Explanation:

The ionization equation is

H_{2}PO_{4}^{-}  +H_{2}O ⇄HPO_{4}^{-2}  +H_{3}O^{+} (1)

As the Bronsted definition sais, an acid is a substance with the ability to give protons thus, H2PO4 is the acid and HPO42- is the conjugate base.

The Ka expression is the ratio between the concentration of products and reactants of the equilibrium reaction so,

Ka = \frac{[HPO_{4}^{-2}] [H_{3}O^{+}]}{[H_{2}PO_{4}^{-}] [H_{2}O]} = 6.2x10^{-8}

The pKa is

-Log (Ka) = -Log (6.2x10^{-8}) = 7.2

The pKa of H2CO3 is 6,35, thus this a stronger acid than H2PO4. The higher the pKa of an acid greater the capacity to donate protons.

In the body H2CO3 is a more optimal buffer for regulating pH due to the combination of the two acid-base equilibriums and the two pKa.

If the urine is acidified, according to Le Chatlier's Principle the equilibrium (1)  moves to the left neutralizing the excess proton concentration.

3 0
4 years ago
What is the pH of a solution that has 7.8x10-9 [H+]?
xxTIMURxx [149]

Answer:

8.11

Explanation:

pH = -log[H+]

pH = -log[7.8 x 10^{-9}]

pH = 8.107905...

pH = 8.11

5 0
3 years ago
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