assume that the pressure in the bottle was 1.5 atm, the bottle had a headspace of 20 mL, and the headspace contained 90% CO2. Also assume that the soft drink contains no significant concentrations of ions other than carbonate species and dissociation products of water. (5°C -> 20°C) given: 20ml, 18ml of CO2, 90% of CO2 How many milligrams of CO2 were released to the atmosphere from when the soft drink was first opened until it went flat?