Hydrazine (h2nnh2), hydrogen peroxide (hooh), and water (h2o) all have exceptionally high surface tensions compared with other substances of comparable molecular weights. a. draw the lewis structures of these three compounds. b. what structural property do these substances have in common, and how might that account for the high surface tensions?

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.