1. A 18.0 L gas cylinder is filled with 9.80 moles of gas. The tank is stored at

Question

1. A 18.0 L gas cylinder is filled with 9.80 moles of gas. The tank is stored at 25 C . What is the pressure in the tank?

Express your answer to three significant figures and include the appropriate units. Ptank =

2. A 180. L kiln is used for vitrifying ceramics. It is currently operating at 1125 C , and the pressure is 1.050 atm . How many moles of air molecules are within the confines of the kiln?

Express your answer to three significant figures and include the appropriate units. nair =

3. A 20.0 L gas cylinder has been filled with 4.40 moles of gas. You measure the pressure to be 4.90 atm . What is the temperature inside the tank?

Express your answer to three significant figures and include the appropriate units. Ttank =

Explanation / Answer

1 )

volume of gas cylinder = 18.0 L

moles of gas = 9.80 mol

temperature = 25 oC = 298 K

P V = n R T

P x 18 = 9.80 x 0.0821 x 298

P = 13.3 atm

pressure of tank = 13.3 atm

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