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Bad White [126]
3 years ago
5

Hello, I'm on a test can you guys help me answer this question? I'll mark brainliest to whoever has a good answer

Chemistry
1 answer:
iogann1982 [59]3 years ago
6 0

Answer:Some of the heat energy from the soup is transferred to the metal by the direct contact of the water molecules with the metal molecules of the spoon.

Explanation:

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What is the pressure in a 245 L tank that contains 5.21 kg of helium at 27 Celsius ​
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<h2><u>Answer:</u></h2>

(These are not rounded to the correct decimal)

130.94 atm

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<h2><u>Explanation:</u></h2>

<u></u>

PV = nRT

V = 245L

P = ?

R = 0.08206 (atm) , 8.314 (kPa) , 62.4 (mmHg)

T = 273.15 + 27 = 300.15K

n = 1302.5 moles

How I found (n).

5.21kg x 1000g/1kg x 1 mole/4.0g = 1302.5 moles

Now, plug all the numbers into the equation.

Pressure in atm = (1302.5)(0.08206)(300.15) / 245 = 130.94 atm (not rounded to the correct decimal)

Pressure in kPa = (1302.5)(8.314)(300.15) / 245 = 13,266.6 kPa (not rounded to the correct decimal)

Pressure in mmHg = (1302.5)(62.4)(300.15) / 245 = 99,571.4 mmHg (not rounded to the correct decimal)

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