Để khử hoàn toàn 4,56 gam hỗn hợp X gồm FeO, Fe2O3, Fe3O4 cần 0,075 mol H2. Mặt khác hòa tan hoàn toàn 4,56 gam hỗn hợp X trong dung dịch H2SO4 đặc nóng dư thu được V ml khí SO2 (đktc), Tính V.

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.

What woukd most likely be the transmittance at a 0.70 m solution of solute a? a) 7.6%b) 1.1%c)4.0%d)4.6%

What is the mass of oxygen gas is consumed in a reaction that produces 4.60mol so2