Half life in chemistry i wasn't here when we did this

Smog is the term used to describe the combination of fog and smoke

What metric units would you use to measure the thickness of a key

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.