Which of the molecules are polar?

a) ch3f
b) nh3
c) hf
d) h2o
e) ch4
f) becl2

If the root word engage means “to connect with something,” what does the word disengage mean in the following sentence? he disengaged the gears by stepping on the clutch pedal.a.added more engine powerb.activated a connection to the pedalc.stalled the engined.released a connection to the pedal

Which produce would best increase the amount of heat energy that is actually gained by calorimeter b

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.