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2 years ago

Plz Help I have One more time To retake and I can't fail it..

Chemistry

1 answer:

frosja888 [35]2 years ago

7 0

$option(a)$

Explanation:

You answer is correct as you move from left to right across a period. But, the question is asked regarding to the right to left across a period. So, as you move from right to left across a period, you can find firstly Non-metals, secondly Metalloids, and lastly Metals.

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Need Some Quick Help, Please :)

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3 years ago

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3 years ago

How does increasing the temperature affect a reaction?

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2 years ago

Calculate the number of moles of a gas that is present in a 7.55 L container at 45°C, if the gas exerts a pressure of 725mm Hg.

vovikov84 [41]

<u>Answer:</u> The number of moles of gas present is 0.276 moles

<u>Explanation:</u>

To calculate the number of moles of gas, we use the equation given by ideal gas:

PV = nRT

where,

P = Pressure of the gas = 725 mm Hg

V = Volume of the gas = 7.55 L

n = number of moles of gas = ?

R = Gas constant = $62.3637\text{ L.mmHg }mol^{-1}K^{-1}$

T = Temperature of the gas = $45^oC=(45+273)K=318K$

Putting values in above equation, we get:

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Hence, the number of moles of gas present is 0.276 moles

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2 years ago

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3 years ago

Plz Help I have One more time To retake and I can't fail it..​

Plz Help I have One more time To retake and I can't fail it..