Muriatic acid is the commercial name for hydrochloric acid that can be purchased from hardware stores as a solution that is 30%(w/w) hcl. what mass of this solution contains 7.5g of hcl? ,

Enzymes affect the reactions in living cells by changing the

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.

If an atom has 12 protons and 13 neutrons