A 45.3g sample of lead metal (Cs = 0.129 J/goC) was heated to a temperature of 250 oC and then transferred to a coffee cup calorimeter containing 38.2 g of water at 18.5 oC. When the system reached thermal equilibrium, what was the final temperature?

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution? a. 3.88 m, b. 1.03 m, c. 1.5 m, d. 15.5 m

What human activity increases beach erosion?

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.