Consider the reaction below. 0.0067 M SbCl5 is placed in a one liter flask and the system is allowed to reach equilibrium. What is final concentration of SbCl5? Kc at this temperature is 2.5 x 10-2.

The question is incomplete, here is the complete question:

Consider the reaction below.

0.0067 M SbCl₅ is placed in a one liter flask and the system is allowed to reach equilibrium. What is final concentration of SbCl₅? Kc at this temperature is 2.5 x 10-2.

The final concentration of is 0.0012 M

Explanation:

We are given:

Initial concentration of = 0.0067 M

For the given chemical equation:

Initial:              0.0067

At eqllm:       0.0067-x           x              x

The expression of for above equation follows:

We are given:

Putting values in above expression, we get:

Neglecting the negative value of 'x' because concentration cannot be negative

So, final concentration of

Hence, the final concentration of is 0.0012 M

explanation:

i think option no d is the correct answer

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.