Chemistry, 10.05.2021 17:50 firefightergros3547
750 million years ago, there was enough Uranium-235 present in Oklo, Gabon to have a natural fission reacton occur and generate a chain reaction. If there is currently 50kg of U-235 present in Oklo, how much must have been present 750 million years ago when the reaction took place? A) 50 kg B) 100 kg C) 200 kg D) 375 kg B 100kg because i put 50 and it was wrong.
Answers: 3
Chemistry, 22.06.2019 09:10, aleilyg2005
Select the correct answer from each drop-down menu. describe what happens to a carbon-11 atom when it undergoes positron emission. the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons
Answers: 3
Chemistry, 22.06.2019 19:20, evansh78
Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?
Answers: 3
750 million years ago, there was enough Uranium-235 present in Oklo, Gabon to have a natural fission...
Mathematics, 23.06.2020 19:01