Che 121 Problem Paper 4 Chemistry Worksheet With Answers Page 4
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1
2
3
4
5
6
7(b)
4 e- regions 1 lone pair ∴ trigonal pyramidal
-
(c) 2N
10e
:N≡N:
only two atoms ∴ linear
15. Name the following binary compounds:
a. CO
2
b. CO
c. NO
2
d. N
O
2
5
e. CS
2
(a) carbon dioxide (b) carbon monoxide (c) nitrogen dioxide
(d) dinitrogen pentoxide (e) carbon disulfide
16. Predict if the following will be polar or non-polar
a. N
2
b. CO
c. H
O
2
(a) non-polar as only two atoms (linear) and both the same
(b) polar as only two atoms (linear) and are different
(c) more than two atoms so need to consider shape
-
0
4e
regions so the angle between the two outer H atoms will be 109.5
.
There is a non-symmetrical distribution of outer atoms so H
O is a polar
2
molecule
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