Question

An open flask sitting in a lab refrigerator looks empty, but is actually filled with a mixture or gases called air. If the flask volume is 1.00 L, and the air is at standard temperature and pressure, how many gaseous molecules does the flask contain?

Answer 1

n= N/N_A, N= nxN_A.

n= V/22.4 = 0,0446428571 moles.

N= 0,0446428571 x 6.02 x 10^23 = 2,6875e22 .