An aqueous solution is 3.50% by mass potassium bromide, KBr, and has a density of 1.02 g/mL. The molarity of potassium bromide in the solution is

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:

c (diamond),

sio2 (quartz)