4.16cm3+180.5cm3 correct number of significant fingers with units

Chemistry do these i am so stressed i have 14 essays due tomorrow

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.

What produces wave a)sound b) heats c)transfer of energy d)vibrations