1.A
2.D
3.B
4.C
5.B
6.B
7.D
8.C
9.C
10.C
11.A
12.B
13.D
14.A
15. A
16.C
17.D
18.D
19.B
20.C
21.B
22.B
23.a)4ab/3 (4ab over 3)
b)i)approx. 19 degrees celsius
sry-would type out the rest, but some you can't type out on a post and I ahve to cram for tommorrow
hope it helps