What does the presence of a polar covalent bond show about the
electronegativities of its two atoms?
A. The electronegativities of the two atoms are not equal.
B. The effects of electronegativity differences are canceled out.
C. The difference in electronegativities is greater than 1.7.
D. The electronegativities of the two atoms are the same.

Ithink 2 is the correct

The answer would be true

Following are the  advantages of the parametric equations: 1) they can be used to graph curves that are not functions, like the unit circle.2) the parameter can be used to represent the quantity that is  useful to  provide us with better information about the graph.3)  it is useful to convert between rectangular equations and parametric equations.with specific reference to chemistry,  parametric equations are employ for solving hydrogen and hydrogen-like ions, quantum mechanically. herein, cartesian coordinates are converted in spherical polar coordinates. the solution obtained, when plotted on spherical polar graph paper, provides visualization of atomic orbital such as s,p,d and f.