1. The problem statement, all variables and given/known data 1) Use Le Chatelier's prinicile to explain how a shift in the equilibrium H2CO3(aq) ⇌ H2O(l) + CO2(g) causes a soft drink to go flat when its container is left open to the atmosphere. 2) How might the addition of a noble gas to the reaction vessel affect this equilibrium? 2N2H4(g) + 2NO2(g) ⇌ 3N2(g) + 4H2O(g) Assume that the volume of the reaction vessel does not change. 2. Relevant equations 3. The attempt at a solution 1) My answer is: The more air that the soft drink comes into contact with the atmosphere the equilibrium will shift to the side where H2O and CO2 are because of the CO2 turning into a gas. 2) My answer is: It may cause the reactions equilibrium to shift towards the products. This maybe easy for some people, but it's hard for me to understand this concept and I really need a good grade on my tomorrows test. Thank you.