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74 L of an ideal monatomic gas is at an absolute pressure of 3 atm when the temperature is 25 C.

(a) How many moles of gas are there?

_____ moles

(b) How many molecules of the gas are there?

_____ K

(d) In the expansion, how much work is done by the gas?

_____ J

(e) In the expansion, what is the change in the internal energy of the gas?

_____ J

(f) In the expansion, how much heat is added to the gas (positive or negative)?

_____ J

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