What is slab pull a) when edges become denser b) cooler, denser crust sinks into the mantle c) folding and crumpling d) currents just beneath the earth's crust flow slowley

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.