NADH and NAD are the reduced and the oxidized forms respectively of the coenzyme NAD. Solutions of NADH, but not NAD , absorb light at 340 nm. This property is used to determine the concentration of NADH in solution by measuring spectrophotometrically the amount of light absorbed at 340 nm by the solution. Explain how these properties of NADH can be used to design a quantitative assay for lactate dehydrogenase.

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

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.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?