A cylinder contains 4.0 g of nitrogen gas. A piston compresses the gas to half its initial volume. Afterward, by what factor has
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Answer: The new partial pressures of when equilibrium is re-established are 223.4 torr, 6.82 torr and 26.4 torr respectively.
Explanation:
For the given chemical reaction:
The expression of for above reaction follows:
........(1)
We are given:
Putting values in above equation, we get:
Now we have to calculate the new partial pressure of .
The reaction is re-established and proceed to right direction by Le-Chatelier's principle to cancel the effect of addition of .
Now, the equilibrium is shifting to the reactant side. The equation follows:
Initial: 13.2 32.8 217.0
At eqm: 13.2-x 32.8-x 217.0+x
Putting values in expression 1, we get:
Neglecting the 40.4 value of 'x' because pressure can not be more than initial partial pressure.
Thus, the value of 'x' will be, 6.38 torr.
Now we have to calculate the new partial pressures after equilibrium is reestablished.
Partial pressure of = (217.0+x) = (217.0+6.38) = 223.4 torr
Partial pressure of = (13.2-x) = (13.2-6.38) = 6.82 torr
Partial pressure of = (32.8-x) = (32.8-6.38) = 26.4 torr
Hence, the new partial pressures of when equilibrium is re-established are 223.4 torr, 6.82 torr and 26.4 torr respectively.
Answer: B) 46.7% Si and 53.3% O
Explanation:
To calculate the mass percent of element in a given compound, we use the formula:
Mass of quartz = 5.05 g
Mass of silicon = 2.36 g
Mass of oxygen = Mass of quartz - mass of silicon = 5.05g - 2.36 g = 2.69 g
Thus the percentages of silicon and oxygen in quartz are B) 46.7% Si and 53.3% O