Which square (A, B, C, or D) represents the repeating subunit of the polymer shown? Т-0-0
-
-
Н Hн Hн Н Н Hн Н
С – С – С – С-с – С-с – с Hс – С-
Н CH, A CH,
,
ён, нан, Н
-
CH, H
н
3
A
В
С
D
р

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size

What is the main reason why some developing countries fear the increase the free trade policies around the world?

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.