The combustion of a sample of butane, c4h10 (lighter fluid), produced 2.46 grams of water.

2 c4h10 + 13 o2 > 8 co2 + 10 h2o

(a) how many moles of water formed?

(b) how many moles of butane burned?

(c) how many grams of butane burned?

(d) how much oxygen was used up in moles? in grams?
chem

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.