4. Which compound below contains the longest carbon-to-nitrogen bond? H
H
1
(A) H-C-N-H (B) 1-c-c=-(CH-CEN:
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H H
H H
a) A
b) B
C C
d) none; all are equal

a

Explanation:

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 gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.