Which sample equation best illustrates the law of conservation of mass?
a. 4 grams reactant u+3 grams reactant v to 7 grams product w
b. 12 grams reactant x+10 grams reactant y to 2 grams product z
c. 5 grams reactant e+5 grams reactant f to 20 grams product g+5 grams product h
d. 10 grams reactant q+9 grams reactant r to 90 grams product s+90 grams product t

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.