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otez555 [7]
3 years ago
6

A sample of an ideal gas is cooled from 50.0°C to 25.0°C in a sealed container at constant volume.

Chemistry
1 answer:
ozzi3 years ago
3 0

Answer: Option (E) is the correct answer.

Explanation:

Since, it is given that the container is sealed one. So, no gas molecule is able to escape into the surrounding. Therefore, average molecular mass of the gas will remain the same.

Also, it is given that gas is cooled down from 50^{o}C to 25^{o}C. This means that there occurs a decrease in kinetic energy of the molecules of gas as kinetic energy is directly proportional to temperature.

Mathematically,      K.E \propto \frac{3}{2}kT

Hence, sped of molecules will decrease and molecules become closer to each other with decrease in temperature.

Thus, we can conclude that following values for the gas will decrease.

  • The average distance between the molecules.
  • The average speed of the molecules
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What is 30-9x2*2-21-4+4
IgorC [24]
Answer:
9 (1-2x²)

Explanation:
The given expression is:
30 - 9x²*2 - 21 - 4 + 4
The first step is to compute the multiplication. This will give:
30 - 18x² - 21 - 4 + 4
Then, we will add like terms as follows:
(30-21-4+4) - 18x²
= 9 - 18x²
Finally, we can take the 9 as a common factor from both terms, this will give:
9 (1-2x²)

Hope this helps :)

5 0
3 years ago
Is the law of conservative mass observed in this equation CaCO3 + 2HCI -->CaCI2 +H2O + CO2
pychu [463]

Answer:

The law is observed in the given equation.

Explanation:

CaCO₃ + 2HCI → CaCI₂ +H₂O + CO₂

In order to find out if the law of conservative mass is followed, we need to <u>count how many atoms of each element are there in both sides of the equation</u>:

  • Ca ⇒ 1 on the left, 1 on the right.
  • C ⇒ 1 on the left, 1 on the right.
  • O ⇒ 3 on the left, 3 on the right.
  • H ⇒ 2 on the left, 2 on the right.
  • Cl ⇒ 2 on the left, 2 on the right.

As the numbers for all elements involved are the same, the law is observed in the given equation.

8 0
3 years ago
Elements with similar properties are located
Nataly [62]
Those elements with similar properties are in the same column.
4 0
3 years ago
What is a covalent bond?
Sphinxa [80]
It is the electron sharing.
electronegative element + electronegative element

exemple :

O₂ , H₂

hope this helps!
3 0
3 years ago
These are three theorized causes of A) glacial melting. B) changing of the climate. C) high and low ocean tides. D) movement of
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actually its D) movement of tectonic plates

8 0
3 years ago
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