How to obtain ethylene from trichloromethane? ?

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 barium and copper bromide

the answer is c.the valence of the atoms combine .

the objects have the same charge is correct.

nathan lee