Question

___ is an example of a polar bond and ___ is an example of a non - polar bond.
c - o; p - p
c - h; n - h
o - o; c - o
c - c; o - o
___ is an example of a non - polar bond and ___ is an example of a polar bond.
c - o; p - p
c - n; n - h
o - h; c - n
p - o; c - n
c - n; c - h
the molecule shown here is hormone noradrenaline. how many carbon atoms are in this molecule?
11
10
9
8
7
which of the following statements is a prediction associated with this hypothesis: the size of bird brains is influenced by muscle mass of flight muscles?
mass of flight muscles will have no effect on brain size.
birds with larger brains will have smaller flight muscles.
brain size is limited by the size of the skull
will a birds brain size shrink if it flies long distances?
how far a bird flies will influence its brain size.

Explanation:

1. A polar bond occurs when there is a significant electronegativity difference between the two atoms in the bond. In C - O, oxygen is more electronegative than carbon, creating a polar bond. P - P is a non - polar bond as both atoms have the same electronegativity.
2. Similarly, for the second multiple - choice about polar and non - polar bonds, P - P is non - polar and C - O is polar.
3. For the noradrenaline molecule, by counting the carbon atoms in the structure: 6 in the benzene ring and 3 in the side - chain, making a total of 9 carbon atoms.
4. A prediction associated with the hypothesis "The size of bird brains is influenced by muscle mass of flight muscles" should be a statement about the relationship between flight muscle mass and brain size. "Will a bird's brain size shrink if it flies long distances?" is a prediction as it relates flight (related to flight muscle use) to brain size change.

Answer:

1. A. C - O; P - P
2. A. C - O; P - P
3. C. 9
4. D. Will a bird's brain size shrink if it flies long distances?