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3 years ago

Describe what happens when a gas changes to a liquid

Chemistry

2 answers:

Elden [556K]3 years ago

4 0

it is c i just took the test

emmainna [20.7K]3 years ago

3 0

The correct answer from the choices provided would be option C. This is the same concept for when a liquid changes to a solid. The particles slow down and become more closely packed causing them to align and form a solid.

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Answer:

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3 years ago

Can you please help solve and explain the steps for the calculation?

Nimfa-mama [501]

Answer:

The hydrogen ion concentration in a solution, [H+], in mol L-1, can be calculated if the pH of the solution is known.

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2 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.

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4 years ago

Why are x-rays telescopes and gamma-ray telescopes in space?

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3 years ago

Predict what happen to the margarine if it's consciously exposed under the sun for a long time .

photoshop1234 [79]

Answer:

Melt

Explanation:

It will melt into a thing liquid

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3 years ago