PLEASE HELP ! (In the column for the other reactants and/or products indicate whether they increase, decrease, or stay the same.)

Chemical Reaction:

A (g) + B (g) ←→ 3C (g)

Blue ← → Clear, Colorless
WHAT ARE THE:
Stress , Equilibrium Shift (right or left) , A (g) , B (g) , C (g) , What color?

1. Add A
2. Add B
3. Add C
4. Remove A
5. Remove C

See Explanation

Explanation:

We must remember that when a constraint such as a change in concentration, pressure or temperature is imposed on a reaction system in equilibrium, the equilibrium position will shift in such as way as to cancel the constraint.

If more of A or more of B is added to the system, the equilibrium position will shift towards the right and the solution becomes clear and colorless.

If C is added to the system, the equilibrium position will shift towards the left and the solution colour turns blue.

If A is removed from the system, the equilibrium position is shifted towards the left and the solution once again turns blue.

If C is removed from the system, the equilibrium shifts towards the right and the solution turns clear and colorless

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.

explanation: no but i do not usually comment