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Mashcka [7]
3 years ago
5

Which element is a halogen? chlorine (Cl) oxygen (O) carbon (C) radon (Rn)

Chemistry
2 answers:
PIT_PIT [208]3 years ago
7 0

Answer:

chlorine      Answer B

Explanation: E

BARSIC [14]3 years ago
4 0

Answer is chlorine (Cl)

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An ideal gas is held in a rigid container at temperature of 201∘C. Upon cooling the gas, the pressure decreases by a factor of 2
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Answer:

237 K

Explanation:

Given that,

Initial temperature, T₁ = 201⁰C = 474 K

Let P be the initial pressure. Upon cooling the gas, the pressure decreases by a factor of 2.0, while the volume and the amount of gas remain constant.

Final pressure = P/2

The relation between the pressure and temperature is as follows :

\dfrac{P_1}{P_2}=\dfrac{T_1}{T_2}

Put all the known values,

\dfrac{P}{\dfrac{P}{2}}=\dfrac{474}{T_2}\\\\2=\dfrac{474}{T_2}\\\\T_2=\dfrac{474}{2}\\\\T_2=237\ K

So, the final temperature of the gas is equal to 237 K.

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