Which of the following formulae is consistent with a molecular ion peak at m/z 73 in a mass spectrometry experiment and a significant fragment peak at m/s= 16? a. C4H11N
b. C4H10O
c. C3H8N2
d. C3H5NO

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:

a polar bond is formed when electrons are shared unevenly between atoms

b. is the answer hoped i