A pure substance is made up of several types of atoms

true or false

Which statement can best be concluded from the ideal gas law?

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.

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.