1. The problem statement, all variables and given/known data A vacuum pump on Earth can produce a vacuum with a pressure as low as 1.00*10^-8 torr. How many molecules are present in each mL at a temperature of 27.0 degrees Celsius? V = 1mL = 10^-3 L <-- How many sig figs should I use here? Should I make it 1.00*10^-3L or keep it 10^-3L? P = 1.315789 atm T = 300.15 K n = ? 2. Relevant equations Pv = nRT 3. The attempt at a solution PV =nRT n = PV / RT = (1.315789atm)(1.00*10^-3L) / (0.08206 Latm / Kmol)(300.15K) = 5.342156*10^-16mol * 6.022*10^23 molecules = 3.22*10^8 molecules / L <--- How do I change my answer back to how many molecules/mL and how many sig figs should my answer reflect? 1 or 3?