“Rubbing alcohol” is a mixture of isopropyl alcohol (C3H7OH)…

“Rubbing аlcоhоl” is а mixture оf isopropyl аlcohol (C3H7OH) and water that is 70 percent isopropyl alcohol by mass (density = 0.79 g/mL at 20 degrees C). Express the concentration of rubbing alcohol in (a) molarity and (b) molality. MM C3H7OH - 60.09 g/mol and you can assume 100g of solution.