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EXAM 4 CHEMISTRY 113 / 2024 / 100% CORRECT ANSWERS
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EXAM 4 CHEMISTRY 113EXAM 2024
100% CORRECT ANSWERS
,1. Boyle's Law: what quantity relating pressure P and volume V is constant?
ANSWER: P X V
2. A 12-liter tank contains helium gas pressurized to 160
What size tank would be needed to contain this same amount of helium at
atmospheric pressure (1 atm)?
ANSWER: P1V1=P2V2
P1 = 160
V1= 12
P2= 1
V= ?
160(12)=(1)(?)
=1920
3. How many 3-liter balloons could the 12-L helium tank pressurized to 160
Atm fill?
Keep in mind that an "exhausted" helium tank is not empty. In other words,
once the gas inside the tank reaches atmospheric pressure, it will no longer be
able to fill balloons.
, ANSWER: 1920-12 = 1908
1908/3 = 636
4. Charle's Law:
According to Charles's law, for a fixed quantity of gas at constant pressure,
which of the given quantities is constant?
ANSWER: v/t
5. A balloon was filled to a volume of 2.50 L
when the temperature was
30.0 What would the volume become if the temperature dropped to 11.0?
ANSWER: C to K = 273.15
30 + 273.15 = 303.15
11+ 273.15 = 284.15
2.5 X _____ _____ = 2.34 L
303.15 284.15
6. Avogadro's Law:
ANSWER: If the volume of a certain gas is changed from
V1 to V2 the corresponding change in number of moles will be n1 and n2. For such a
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