Red cabbage is an organic indicator for acids and bases. in the pictures above, which test tube(s) may have ammonia dissolved in it?
a) ammonia is probably in the middle since it is naturally a gas and will evaporate off leaving a neutral solution with ph = 7.
b) ammonia could be in a couple of the test tubes on the right since it is a acid.
c) ammonia could be in the middle or the right test tubes since it is a weak to moderate base.
d) ammonia may be in one of the test tubes on the left since the ph of ammonia is below 7.
the image is

Electromagnets coils of wire paper clips picked up 10 3 15 6 20 9 25 12 ms. owens' class was studying magnets. ms. owens showed her students how to make an electromagnet using a nail, a d-cell battery, and plastic coated wire. the students wrapped the wire around the nail and then attached the ends to the battery. when they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. they also tested whether they could increase the strength of their electromagnets by using more coils of wire. they recorded the class average of their results in the data table seen here. ms. owens asked her students to graph their data in a line graph. how should the students label the x-axis on their line graph? a) size of battery b) number of paper clips c) number of coils of wire d) strength of electromagnet