Does a mole of hydrogen have the same mass as a mole of oxygen?
explain your answer.

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

An experimental procedure requires a 10 ml of acid to be dissolved

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.