How many photons are contained in a flash of blue light (422 nm) that contains energy? show your work. answers wit attention to significant figures and units

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.

Determine type of reaction & predict the product c3h12+o2 =

In an experiment, 45g of silicon tetrachloride are treated with 45ml of water. what is the theoretical yield in grams of hcl