Answers: 1
Chemistry, 22.06.2019 10:00
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.
Answers: 1
Chemistry, 23.06.2019 14:00
Which is not true regarding reaction rates? (2 points) catalysts are not used up in the reaction. catalysts speed up reactions by lowering the activation energy. reaction rates decrease as the concentration of reactants decrease. during reactions, concentrations of all reactants decrease at the same rate.
Answers: 1
Chemistry, 23.06.2019 16:30
Ascientist measures the vapor pressure of a liquid. at 15° c, the vapor pressure was 19 kilopascals. at 25° c, it was 31 kilopascals. at 35° c, it was 59 kilopascals. which statement can be inferred from the observations?
Answers: 3
Chemistry, 23.06.2019 19:30
Which of the following is a polyatomic ion? a. calcium, ca2+ b. carbide, c4- c. sulfate, so4 d. selenide, se2-
Answers: 1
What density is and what is it used for...
Mathematics, 13.01.2021 21:10
English, 13.01.2021 21:10
Spanish, 13.01.2021 21:10
Mathematics, 13.01.2021 21:10
Mathematics, 13.01.2021 21:10
Geography, 13.01.2021 21:10
Social Studies, 13.01.2021 21:10
English, 13.01.2021 21:10
Mathematics, 13.01.2021 21:10
Mathematics, 13.01.2021 21:10