In the scene where Dr. Mark Hall (the surgeon specializing in blood chemistry) and Dr. Jeremy Stone went to Piedmont in space suits, what information did they gather by viewing the bodies?

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.

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?

Which factor is likely to impact the possible number of compounds ?