If the temperature changes in a chemical reaction, what has occured?
a)energy was destroyed
b)energy was created
c)there was no energy transfer
d)energy was transferred

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.

Is powdered sports drink ionic or covalent ? 10pts !