a. Suppose that it is not possible for you to equalize the levels of water in th

Question

a. Suppose that it is not possible for you to equalize the levels of water in the flask and the beaker (because of some geometric constraint) before you measure the volume of water displaced. Can you devise a way (write an equation) to find the pressure inside the flask? Remember that there are two cases; give a formula for each. It may help you to know that the density of H20 is 1.00 g/mL, for Hg, 13.6 g/mL. b. which maintains a constant pressure of 25.0 torr? (what is the final temperature of the system?) c. The formula of nitrogen oxide is NO, of nitrogen dioxide is NO2. Write a balanced equation for the reaction of nitrogen oxide with oxygen. For each (1.0) mole of NO: What would happen if a flask containing water, initially at 31°C, were attached to a vacuum pump i. how many moles of 02 are consumed and of NO2 produced? li. how many liters of each (state conditions)? ili. how many grams of each?

Explanation / Answer

2 NO + O2 ? 2NO2

in terms of moles ; 2 mole of NO and 1 mole of O2 will give 2 mole of NO2

In litter, 44.8 L and 22.4 L will give 44.8 L at STP

In terms of gram : 2 NO = 2 ( 14 +16 ) = 2 x 30 = 60g

O2 = 16x 2 = 32 g

2 (NO2) = 2 x ( 14+ 32 ) = 2 x ( 46) = 92 g

that is 60 g of NO and 32 g of oxygen will react together to give 92 g of 2 NO2.

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