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rebecca7415
05.05.2020 •
Chemistry
When a sample of a gas was placed in a sealed container with a volume of 3.35L and heated to 105°C, the gas vaporized and the resulting pressure inside the container was 170.0kPa. How many moles of the gas was president?
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Ответ:
181.12 moles
Explanation:
V = 3.35L
T = 105°C = (105 + 273.15)K = 378.15K
P = 170.0kPa = 170.0*10³Pa (1kPa = 1000Pa)
R = 8.314J /mol.K
n = ?
From ideal gas equation,
PV = nRT
P = pressure of the gas
V = volume of the gas
n = number of moles
R = ideal gas constant
T = temperature of the gas
PV = nRT
n = PV / RT
n = (170*10³ * 3.35) / (8.314 * 378.15)
n = 569500 / 3144.317
n = 181.12 moles
Ответ:
220 N * m or 220 J
Step-by-step explanation:
We have that the work formula would be the applied force multiplied by the distance traveled, that is:
W = F * d
In this case the F is 200 N and the distance is 1.1 meters, therefore we replace:
W = 200 * 1.1
W = 220 N * m = 220 J
Therefore the work carried out by Clarissa and her mom is 200 joules.