posted by Rafael .
If 0.8000 g of a mineral yields 0.2400 g of NaCl + KCl, and this mixture contains 58.00% of Cl, what is the percentage of Na2O and K2O in the mineral?
To Raphael, Ariel, Maxine, et al.: this is not a place to dump all of your homework. I've worked SEVERAL of these problems below. I shall be happy to help you through the others AFTER you show some of your work. Alternatively, explain what you don't understand about the question and what you do understand about the question. Again, let me remind you that it takes more time to answer these when you change screen names.