Chemistry, 04.04.2020 13:01 Fireburntbudder

A sample of chlorine gas occupies a volume of 775 mL at a pressure of 545 mmHg. Calculate the pressure of the gas (in mmHg) if the volume is reduced at constant temperature to 171 mL. Enter your answer in scientific notation.

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Answer from: AsiaDeas4078

Answer : The final pressure of the gas is, $2.47\times 10^3mmHg$

Explanation :

Boyle's Law : It is defined as the pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.

$P\propto \frac{1}{V}$

or,

P_1V_1=P_2V_2

where,

P_1 = initial pressure = 545 mmHg

P_2 = final pressure = ?

V_1 = initial volume = 775 mL

V_2 = second volume = 171 mL

Now put all the given values in the above equation, we get:

$545mmHg\times 775mL=P_2\times 171mL$

$P_2=2470.03mmHg=2.47\times 10^3mmHg$

Therefore, the final pressure of the gas is, $2.47\times 10^3mmHg$

Answer from: Quest

Answer: abeexplanation:

1. the question asks the most appropriate, which seems to rule out "all of the above." your choice appears to be the correct one.

2. the protocol described is good for identifying correlation, but not cause and effect. for cause/effect, you need to devise a protocol that will assign the treatment (or not) to groups that have essentially the same "demographics" with respect to all the other variables. your choice regarding control group seems appropriate. random assignment of treatment (choice d) may be appropriate also. (i think you can argue that b and d are just different descriptions of the same method.)

3. d will randomize the birds, but may not guarantee there are 10 in each group. e will do both, so seems the better choice.

comment on question 2

based on the problem statement, it seems clear that confident, attentive drivers are more likely to use daytime running lights. so, the protocol might need to be devised in such a way that the lights would be turned on or off without the driver's knowledge. (an attentive driver will figure it out.) assigning a confident, attentive driver to a group required to drive without running lights might mess with his/her confidence and attentiveness. you don't want your experiment to do that. (nor do you want the experiment to subject a driver to greater risk of accident as a consequence of driving without running lights.) experiments involving human safety are always problematic.

Answer from: Quest

the increase of protons hope this

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A sample of chlorine gas occupies a volume of 775 mL at a pressure of 545 mmHg. Calculate the pressu...

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