Find the reactions (a)
5,25 g
HF to moles
(b) 6.00 moles SiO2 to grams of H2SiF6
(c) 10,0 moles Hf to liters HF
(d) 3,20 mol Si02 to molecules H2S i F6

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.