Which substance is not a heterogeneous mixture ?

a: trail mix

b: oil and vinegar dressing

c: chocolate chip cookies

d: cooking oil

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.

How hot is the suns corona? (integrated science)

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp