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Constructed Response . Topic 1: Matter and Energy

Set J: Volume conversion, gas law calculation, Avogadro’s law.

Answer questions 38 through 41 on the information below.

Teacher Preview Copy

Teacher Preview Copy

38. Express the initial volume of the helium gas 38.

sample, in liters.

39. The piston is pushed further into the cylinder. 39.

In the space to the right, show a correct numerical

setup for calculating the volume of the helium

gas that is anticipated when the reading on the

pressure gauge is 1.5 atmosphere. The temperature

of the helium gas remains constant.

40. Helium gas is removed from the cylinder and a 40.

sample of nitrogen gas, N2(g), is added to the

cylinder. The nitrogen gas has a volume of

125.0 milliliters and a pressure of 1.0 atmosphere

o
at 20.0 C. Compare the number of particles in this

nitrogen gas sample to the number of particles

in the original helium gas sample.

41. Express 1.5 atmosphere in kilopascal (kPa) 41.

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