What is the molarity of a 5.00x10^2 ml solution containing 21.1 g of potassium bromide (kbr)? the molar mass of kbr is 119.0 g/mol.

a)3.55x10−4m
b)42.2m
c) 0.355 m
d)8.87∗10−2

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.