Answer choices are directly under each question. Just List out your solution. a)
ID: 800744 • Letter: A
Question
Answer choices are directly under each question. Just List out your solution.
a) The maximum degree of crystallinity in a typical polymer is:
0% 60% 100%
b) Which typically negatively influences thermal conductivity in metals to a greater extent:
Impurities Temperature Both about equal
c) a pentagon has how many mirror planes of symmetry
one five none
d) A triangular object which is white on one side and black on the
other (top and bottom faces) has which rotational axes:
two-fold three-fold both
e) A carbon-carbon double bond can rotate
easily with great difficulty varies with the molecule
f) Chlorine has how many valence electrons
5 7 8
g) Why are transition metal ions typically colored:
close spacing of valence orbitals
high energy state of valance orbitals
mother nature likes pretty colors
h) In going from gas to solid to the entropy of a material
increases decreases is about the same
i) A cube has how many centers of symmetry inversion:
none one an infinite number
j) A hexagon has how many two-fold axes of rotational symmetry:
one four six
k) A carbon-carbon double bond is approximately how much stronger
than a carbon-carbon single bond:
not stronger/the same 2 times 1.5 times
l) Sr (Sr) has how many valence electrons
2 8 29
Explanation / Answer
a) 100% b) impurities c) five d) both e) with great difficulty f) 7 g) high energy state of valance orbitals h) decreases i) an infinite number j) six k) 1.5 times l) 2