Describe the role of energy in chemical reactions.

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.

You have a liquid that exhibits diltancy. you want to pour it from a bottle. what should you do to the bottle before pouring

How does climate change cause the ocean's thermohaline current to slow down?