An ice cube at 0 degrees Celsius is heated until it melts and the water reaches 20 degrees Celsius. The amount if needed for this is 5.000x10^3J. What is the mass of the ice cube?

What happens when an acid dissolves?

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.

How can carbon move from "land" to bodies of water? describe the way human impact has lead to increased levels of co2 in the atmosphere.