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#### Question 2

#### Solution

A 16 cm diameter cylinder that is 43 cm long contains 54 g of oxygen gas at 20 °C.

Express your answers using two significant figures.

Part A: How many moles of oxygen are in the cylinder?

Part B: How many oxygen molecules are in the cylinder?

Part C: What is the number density of the oxygen?

Part D: What is the reading of a pressure gauge attached to the tank?

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