) A certain mass (m) of calcium fluoride contains 1.2x10º anions,
Deduce the mass (m).
Given : NĄ = 6x10^° mol
-1​

b

explanation:

mitosis

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: