Electro magnetic waves are blank waves

What’s the blank PLEASE HELP DUE IN 25 MINUTES

If 200.0g of copper(ll) sulfate react with an excess of zinc metal, what is the theoretical yield of copper

Write the formula for the following chemicals. 7. e. trinitrogen tetraoxide a calcium phosphate f. magnesium acetate b. potassium sulfide g nickel(iii) cyanide c carbon dioxide h. silver sulfate d. cobalt(ii) chloride

What is the lowest number energy level where a d sublevel is found