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masha68 [24]
2 years ago
9

Why is it hot in summer and in the winter why is cold

Chemistry
2 answers:
grigory [225]2 years ago
8 0

Answer: The sun is closer to the Earth is the summer and farther in the winter causing it to be hotter than it is colder in the summer and vise versa for the other question.

Explanation: I learned it ;)

Rainbow [258]2 years ago
4 0

Explanation:

The earth is tipped on its axis, 23.5 degrees in respect to the sun. In the summer time, the northern hemisphere has slightly more hours of daylight because of this, becoming more extreme as one goes north. If you go far enough north, there is 24 hours of sunlight in high summer.

So the average temperature is higher, because there is sunlight is present for more hours and the earth is warmed on balance.

At the same time, the south pole is in shadow, so the southern hemisphere has winter in June.

Six months later, the 23.5 degree tilt has the north pole facing away from the sun, and with fewer daylight hours, the temperature cools progressively. Meanwhile, the southern hemisphere is having it’s summer in December.

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Answer:

Molarity of sodium acetate you will need to add is 0.0324M

Explanation:

<em>Assuming volume of the buffer is 1L.</em>

<em />

The pH of a buffer can be determined using Henderson-Hasselbalch equation:

pH = pKa + log [A⁻] / [HA]

<em>Where pKa is pKa of the weak acid,  [A⁻] molar concentration of conjugate base and [HA] molar concentration of weak acid</em>

<em />

Replacing for the acetic buffer (pKa = 4.76):

pH = 4.76 + log [Sodium Acetate] / [Acetic Acid]

As you have 0.010 moles of acetic acid in 1L:

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0.51 = log [Sodium Acetate] / [0.010M]

10^0.51 = [Sodium Acetate] / [0.010M]

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3.236 [0.010M] = [Sodium Acetate]

0.0324M = [Sodium Acetate]

<h3>Molarity of sodium acetate you will need to add is 0.0324M</h3>

<em />

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