chemistry 40

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1. A 2.00 L container with 4.05g of ethane gas (C2H6) is placed in a constant

temperature bath. The pressure in the container stabilizes to 1.46 atm. What is

the temperature (K) of the gas?

2. Calculate the volume (L) of 525g N2 at 787 torr and 25oC.

3. Some commercial drain cleaners contain two components: sodium hydroxide and

aluminum powder. When the mixture is poured down a clogged drain, the

following reaction occurs:

2NaOH(aq) + 2Al(s) + 6H2O(l) ï‚® 2NaAl(OH)4 (aq) + 3H2(g)

The heat generated in this reaction helps to melt away grease and the hydrogen

gas released stirs up the solids clogging the drain. Calculate the volume of H2

formed at 25

oC and 1.02 atm if 3.72 g of Al is treated with excess NaOH and

H2O.

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