Use the internet to research the ionic compounds listed below to determine if they have medicinal uses. Write the formulas of these compounds and state their use. Barium sulfate Lithium chloride Lithium selenide Sodium chloride Platinum(II) chloride Potassium chloride

Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ