1. A dramatic classroom demonstration involves cooling a balloon from room temperature (293 K ) to...

1. A dramatic classroom demonstration involves cooling a balloon from room temperature (293 K ) to liquid nitrogen temperature (77 K).

If the initial volume of the balloon is 2.5 L , what will its volume be after it cools? (Assume constant pressure.)

Express your answer using two significant figures.

** different kind of question for #2.**

2. A sample of gas in a cylinder as in the example in Part A has an initial volume of 48.0 L , and you have determined that it contains 1.20 moles of gas. The next day you notice that some of the gas has leaked out. The pressure and temperature remain the same, but the volume has changed to 12.0 L . How many moles of gas (n2) remain in the cylinder?

Express your answer with the appropriate units. n2 =

Expert Solution

queen_honey_blossom answered 2 years ago

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