If the average rate of appearance of nh3 in the following reaction is 1.40 m/s, what is the average rate of disappearance of h2 during the same time period?

n2(g) + 3h2(g) → 2nh3(g)

a. 5.40 m/s
b. 2.80 m/s
c. 1.20 m/s
d. 0.700 m/s
e. 2.10 m/s

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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.