1. A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is filled with concentrated sulfuric acid, H2SO4, its mass is 1026.57 g. What is the density of concentrated sulfuric acid? (Assume water has a density of 1.00 g/cm at the temperature of the measurement.) 2. Commercial aqueous nitric acid has a density of 1.42 g/mL and is 16.00 M. Calculate the percent HNO3 by mass in the solution. What is the concentration of solution in molality? 3. What is the pressure of the gas in the flask (in atm and kPa) if the barometer reads 765.2 mmHg? Open end- 4. What is the pressure of the gas in the flask (in atm and kPa) if the barometer reads 738.5 torr? Gas Gas - T Ah = 2.35 cm Closed end- Ah = 3.56 cm