1) A 4.00L flask contains 2.33g of helium at 1520 mm Hg. What is the temperture

Question

1) A 4.00L flask contains 2.33g of helium at 1520 mm Hg.  What is the temperture of the gas? Show all work

a)24.3K

b)41.8K

c)127K

d)167

e)1.27x105K

2) A flask is filled with 70.0g nitrogen gas at STP conditions.  What is the volume of the flask?

a)5.13L

b)56.0L

c)61.1L

d)112L

e)122L

3) A flexible container is filled with nitrogen gas to a volume of 3.22 L at 32 C.  The container is cooled until the temperature reached -132C.  Assume the pressure remains constant, what is the volume of the cooled container?

a)0.628L

b)0.781L

c)1.24L

d)1.49L

e)6.69

4)1.64g of hydrogen gas has a volume of 2.00L at a certain temperature and pressure.  What is the volume of 0.250g of this gas at the same temperature and pressure?

a)0.0512L

b)0.250L

c)0.305L

d)4.01L

e)19.5L

5) Which of the following pure gases has the lowest density at 1.0 atm and 25.0C?

a)oxygen

b)nitrogen

c)carbon monoxide

d)chlorine

e)water vapor

Explanation / Answer

1) a

2) c

3) b

4) a

5)d

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