A container holds a sample of hydrogen gas at 300 K. The temperature decreased to 100 K and the pressure remained constant, and the volume changed to 1.0 L.
What was the original volume?
A) 0.1L
B) 0.3L
C) 1.0L
D) 3.0L

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:

the answer is minerals.

може ли да зареждате повече информация, моля

a is the correct answer