Galvanized nails are iron nails that have been plated with zinc to prevent rusting. the relevant reaction is zn2+(aq)+2e−→zn(s) for a large batch of nails, a manufacturer needs to plate a total zinc mass of 3.40 kg on the surface to get adequate coverage. part a how many moles of zinc are in 3.40 kg of zinc? express your answer to three significant figures and include the appropriate units.

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.