Hoà tan 24,5 gam Cu(OH)2 bằng dd H2SO4 24.5% vừa đủ được dd A .Làm lạnh dd A thấy tách ra 24,25g chất rắn B dd còn lại có nồng độ muối là 24,33% . Tìm CT của B

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.

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Consider the following reaction at equilibrium: c(s)+h2o(g)⇌co(g)+h2(g) predict whether the reaction will shift left, shift right, or remain unchanged upon each of the following disturbances. a) c is added to the reaction mixture. b) h2ois condensed and removed from the reaction mixture c) co is added to the reaction mixture d) h2 is removed from the reaction mixture.