These items concern safety issues in the Mixtures of Acids and Bases lab. (Select all that apply.) (a) Which hazards are associated with chemicals used in these experiments? Some are flammable. All are flammable. All are explosive. All are corrosive. Some are corrosive. Some are explosive. (b) Which chemicals are listed as hazardous? NaH2PO4 NaC2H3O2 NaOH Na2SO4 NH4Cl HCl (c) What actions should you take if you spill these chemicals on yourself? First, flush the affected area with water. Next, have your lab partner notify your instructor about the spill. Next, flush the affected area with water. First, have your lab partner notify your instructor about the spill.

stupid i wont let you get a chance

explanation:

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.

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.