Which of the following statements is true? Mark all that apply. A. The molar mass of CaCO3 is 100 g/mol
B. 50 g of Cacoz contains 9 x1023 oxygen atoms
C. A 200 g sample of CaCO3 contains 2 moles of CaCO3

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.