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Chem Exam 3 Chapter 7,8,9 (1).
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Chem Exam 3 Chapter 7,8,9 (1).
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Chem Exam 3 Chapter 7,8,9Find P1 using Boyle's Law if the following values are used: V1= 1.90 L, P2= 4.19
atm, and V2= 1.09 L. State your answer as a number with two sig figs in atm. -
CORRECT ANSWER-2.4
A sample of gas has an initial volume of 4.95 L at a pressure of 700 mm Hg. If the
volume of the gas is increased to 5.38 L, what is the pressure? - CORRECT
ANSWER-644 mm Hg
1 atm is equal to: - CORRECT ANSWER-All of the Above
A.760 mm Hg
b.760 torr
c. 101,325 Pa
d.14.7 psi
e all of the above
A balloon has 0.500 L of air in it and is submerged in water at a depth with a
pressure of 3.25 atm. What is the volume of the balloon at that depth? - CORRECT
ANSWER-0.5
Initial volume in a cylinder is 750 ml, if pressure changes from 840 mm Hg to 360
mm Hg, what is the final volume of this gas? - CORRECT ANSWER-1.750 L
A 14.8L balloon is at 255K. What is its volume if its temperature is 304K? Answer by
using a number with three sig figs only. - CORRECT ANSWER-17.6
What happens to the volume of a balloon when placed in ice water? What law does
this apply to? - CORRECT ANSWER-Volume decreases as temperature decreases
according to Charles law.
4L of neon are at 323 K. The next day, the temperature decreases to 290 K, what is
the new volume? Express your answer as a number with two sig figs only. -
CORRECT ANSWER-3.6
Hydrogen gas occupies 2 liters of volume at a temperature of 32 degrees Celsius.
What is its temperature when it has a volume of 4 liters? Answer as a number with
two sig figs only. - CORRECT ANSWER-64.0
An oxygen tank holds 4.5 liters of gas at 305 K. What temperature would be needed
to change the volume to 2.2 liters? - CORRECT ANSWER-149K
, What is the pressure of a 3.00 L gas vessel that has 18.0 grams of helium at 25
degrees Celsius? - CORRECT ANSWER-36.7 atm
Which set of conditions reflect STP? - CORRECT ANSWER-273 K, 1 atm
How many moles of gas were added to a cylinder that started with 2.3 moles of gas
and a volume of 1.4 L given that the final volume was 7.2 L? express your answer as
a number with two sig figs only. - CORRECT ANSWER-9.5
What is the final volume of a .5 L gas container that increased in temperature from
299 K to 333 K when pressure increased from 1.00 atm to 1.54 atm? - CORRECT
ANSWER-0.362 L
What is the final volume of a cylinder that was initially 0.5 L at 25 degrees Celsius
and was then heated to 50 degrees Celsius? - CORRECT ANSWER-0.542 L
A specific volume of gas was maintained in a container. If the pressure of the gas in
the container doubled, what would happen to the temperature? - CORRECT
ANSWER-The temperature doubled.
What is the proper form of the combined gas law? - CORRECT ANSWER-P1V1/T1=
P2V2/T2
What is the pressure of 760 mm Hg when expressed in units of Pa? - CORRECT
ANSWER-101,325 Pa
What is the final volume (L) of a 1.78 L system at 315 K and 1.10 atm if STP
conditions are established? Express your answer as a number with three sig figs. -
CORRECT ANSWER-1.7
If the number of moles of a gas initially in a 2.10 L vessel is doubled, what is the final
volume of the gas in liters? - CORRECT ANSWER-4.20
Convert the atmospheric pressure found in this lab from mm Hg to atm. Round to
three sig figs. - CORRECT ANSWER-1.00 atm
Using the circumference of the balloon, calculate the volume of the gas produced.
Circumference = radius/ 2 pi (3.14) Volume of a sphere= (4/3)pi r^3Answer as a
number only with four sig figs in cubic centimeters. - CORRECT ANSWER-351.2
From the correct answer on lab question 7.01, convert the cubic centimeters to liters.
Use three sig figs only.
Numeric Answer: - CORRECT ANSWER-0.351
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