(a) For what mass of molecule or particle is ???rms equal to 1.00 mm/s at 300 K? (b) If the particle is an ice crystal, how many molecules does it contain? The molar mass of water is 18.0 g/mol (c) Calculate the diameter of the particle if it is a spherical piece of ice. Would it be visible to the naked eye?
Solution 79P Problem (a) To find mass of molecule Step 1: v = 1 mm/s or 10 m/s rms T = 330K k = 1.381x10 23 J/K