NEED HELP ASAP
58. The circle graph at the right gives the percent composition for a blue solid. What is the
empirical formula for this solid?
59. Determine the empirical formula for a compound that contains 35.98% aluminum and
64.02% sulfur.
60. Propane is a hydrocarbon, a compound composed only of carbon and hydrogen. It is
81.82% carbon and 18.18% hydrogen. What is the empirical formula?
61. Challenge Aspirin is the world's most often used medication. The chemical analysis
of aspirin indicates that the molecule is 60.00% carbon, 4.44% hydrogen, and 35.56%
oxygen. Determine the empirical formula for aspirin.

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.

the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary

ugh fiel iente of insistí is did kiwis jaj

it's 3.2 on edge, i just took the test.