Aballoon filled with helium gas at 1.00 atm occupies 12.9 l. what volume would the balloon occupy in the upper atmosphere, at a pressure of 0.19 atm and a constant temperature? enter your answer in the box provided.

What term is missing from the central region that describes hypotheses, theories, and laws? popular predictable mathematical falsifiable

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.

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.