Practice problem 1:a bicol tablea is sold in a store. its mass is 8 grams containing 5.2 grams cocoa powder. what is the percent by mass of cocoa powder?practice problem 2:an alcohol is used as disinfectants. its total volume is 100 ml containing 70 ml ethyl alcohol. what is the percentage by volume of ethyl alcohol?pa answer po plsss advence thank you godbless​