Iodine-131 decays with a half-life of 8.02 d. in a sample initially containing 5.00 mg of 131i, what mass remains after 6.01 d

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.