Very important
how do enzymes catalyze chemical reactions?
by giving up electrons

by positioning substrates and destabilizing bonds

by acting as substrates and forming new products

by being used up in the reaction

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.