Which statement best describes the polarity of the molecule PI3? A.
It is nonpolar, because the bonds are polar and the molecular geometry does not affect polarity.
B.
It is nonpolar, because it is a trigonal-planar molecule and the bond polarities cancel each other out.
C.
It is nonpolar, because the electronegativity difference between phosphorus (P) and iodine (I) is very small.
D.
It is polar, because it is a trigonal-planar molecule and the bond polarities between phosphorus (P) and iodine (I) add together.

Compare and contrast physical changes with chemical changes.

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

Which element would mostly likely have an electron affinity measuring closest to zero