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

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

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