Heavy water has a chemical formula d_2o. it is a form of water in which all hydrogen is deuterium ^2h and has a density of 1.11 g/cm^3. neglect the contribution of oxygen atoms. calculate the number of collisions required to slow down a neutron from 2 mev to 0.025 ev heavy water. determine the diffusion length of thermal neutrons in heavy water.

Which of the following statements are evidence that gases do not always behave ideally? check all that apply.? a. co2 gas becomes dry ice (solid co2) at 1 atm and –78.5 °c. b. when two gases are mixed, they follow dalton\'s law of partial pressures. c. at 4 k and 1 atm, helium is a liquid. d. it is impossible to compress a gas enough so that it takes up no volume.