After each step in a dichotomous key, the questions get . Which phrase best completes the sentence?
1. more specific
2.more difficult
3.less specific
4.less difficult

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.

Draw the lewis dot structure for each of the following polyatomic ions

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted