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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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A gas made up of homonuclear diatomic molecules escapes through a pinhole times as fast as gas. Write the chemical formula of th
Art [367]

Answer:

The answer to the question is

Chlorine Cl₂

Explanation:

Graham's Law of effusion states that the rate of effusion of  a gas is inversely proportional to the square root of the molar mass

\frac{R_{1} }{R_{2}} = \sqrt{ \frac{M_{2}}{M_{1}} }

0.238 = \sqrt{ \frac{4}{M_{1}} }

Therefore M₁ = 4÷0.238² = 70.61

Hence the mass of the gas is 70.61, that is X₂ = 70.61  or the molar mass of the element X = 70.61÷2 = 35.308 ≅35.453 Hence the gas is chlorine Cl₂

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3 years ago
Humans affect Earth in many ways. The use of fossil fuels, the clear-cutting of forests, and controlled burns can affect the car
Andreyy89
I think the correct answer from the choices listed above is option A. It is by the process of photosynthesis that would help counteract with human interactions. The carbon dioxide emitted by human activities can be used by this process to produce more oxygen. 
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2 years ago
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What is the oxidation number of phosphorus (P) in sodium phosphate (Na3PO4)?
joja [24]
Na⁺¹₃P⁺⁵O⁻²₄

+1*3 + (+5) + (-2*4) = 0
8 0
3 years ago
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Where can you find the number of electrons of an<br> element?
andrezito [222]

Answer:

Subtract the charge from the atomic number. When an ion has a positive charge, the atom has lost electrons. To calculate the remaining number of electrons, you subtract the amount of extra charge from the atomic number. In the case of a positive ion, there are more protons than electrons.

Explanation:

5 0
3 years ago
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If you have 100 ml of a 0.10 m tris buffer (pka 8.3) at ph 8.3 and you add 3.0 ml of 1.0 m hcl, what will be the new ph?
sukhopar [10]

The new pH is 7.69.

According to Hendersen Hasselbach equation;

The Henderson Hasselbalch equation is an approximate equation that shows the relationship between the pH or pOH of a solution and the pKa or pKb and the ratio of the concentrations of the dissociated chemical species. To calculate the pH of the buffer solution made by mixing salt and weak acid/base. It is used to calculate the pKa value. Prepare buffer solution of needed pH.

                       pH = pKa + log10 ([A–]/[HA])

Here, 100 mL  of  0.10 m TRIS buffer pH 8.3

                 pka = 8.3

         0.005 mol of TRIS.

∴  8.3 = 8.3 + log \frac{[0.005]}{[0.005]}

<em>    </em>inverse log 0 = \frac{[B]}{[A]}

   \frac{[B]}{[A]} = 1

Given; 3.0 ml of 1.0 m hcl.

           pka = 8.3

           0.003 mol of HCL.

pH = 8.3 + log \frac{[0.005-0.003]}{[0.005+0.003]}\\pH = 8.3 + log \frac{[0.002]}{[0.008]}\\\\pH = 8.3 + log {0.25}\\\\pH = 8.3 + (-0.62)\\pH = 7.69

Therefore, the new pH is 7.69.

Learn more about pH here:

brainly.com/question/24595796

#SPJ1

 

8 0
2 years ago
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