Four samples of gas each exert 675 mm hg in separate 3.5 l containers. what pressure will they exert if they are all placed in a single 3.5 l container? a.169 mm hg b.675 mm hg c.2.36 x 103 d. 2.70 x 103

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.