1. The problem statement, all variables and given/known data Suppose we make a circular hole 2 millimeter in diameter in a balloon. Calculate the initial rate at which oxygen escapes through the hole (at 0° C), in number of oxygen atoms leaving the balloon per second. 2. Relevant equations 1/4 n*A*v 3. The attempt at a solution 1/4 n*A*v n = N/V at # of molecules/m^3 (density) n = 6.022e23/.0224 = 2.68839286E25 This is at STP so 22.4 L volume at one mol of gas A = area Pi*.0002^2*1/4 = 3.14159265 × 10-8 V = velocity = sqrt(3*k*T/m) = k = boltzman constant 1.4e-23 T = 273K at STP m = 2.65780731e-26 kg for one molecule of hydrogen Atoms/second = 656.816755 What am I doing wrong?