1. The problem statement, all variables and given/known data A weather balloon is designed to expand to a maximum radius of 30 m when in flight at its working altitude where the air pressure is 0.033 atm and the temperature is 95 K. If the balloon is filled at atmospheric pres- sure and 462 K, what is its radius at lift-off? 2. Relevant equations PV = nRT Volume = 4/3πr^3 3. The attempt at a solution First, I used the ideal gas law to find n: (0.033)(4/3π(30)^3) = n(8.31)(95) n = 4.727610453 mol Then, I solved for r: V = nRT/P 4/3πr^3 = (4.727610453)(8.31)(462)/1 atm r = 11.30381236 m (WRONG ANSWER) What am I doing wrong?