21.Electromagnetic radiation can take the form of which of the following types of waves a. Heat
b. Light
c. Ultraviolet
d. All of the above

Now consider the reaction when 45.0 g naoh have been added. what amount of naoh is this, and what amount of fecl3 can be consumed by it?

What is avogadro’s number, and why is it useful

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.