Calculated the pressure of methane gas in 3.3 L contain 1.2 moles of the gas at 25 Celsius

it should be p1 v1 = p2 v2

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.

explanation:

im pretty sure its b