# Question: In state of the art vacuum systems pressures as low as 10 9

In state-of-the-art vacuum systems, pressures as low as 10-9 Pa are being attained. Calculate the number of molecules in a 1.00-m3 vessel at this pressure if the temperature is 27.0°C.

## Relevant Questions

A room of volume V contains air having equivalent molar mass M (in g/mol). If the temperature of the room is raised from T1 to T2, what mass of air will leave the room? Assume that the air pressure in the room is maintained ...The density of gasoline is 730 kg/m3 at 0°C. Its average coefficient of volume expansion is 9.60 X 10-4 /°C. If 1.00 gal of gasoline occupies 0.003 80 m3, how many extra kilograms of gasoline would you get if you bought ...A liquid has a density p. (a) Show that the fractional change in density for a change in temperature ΔT is Δp/ = -BΔT. What does the negative sign signify? (b) Fresh water has a maximum density of 1.000 ...Consider an object with any one of the shapes displayed in Table 10.2. What is the percentage increase in the moment of inertia of the object when it is heated from 0°C to 100°C if it is composed of (a) copper or (b) ...A sample of dry air that has a mass of 100.00 g, collected at sea level, is analyzed and found to consist of the following gases: Nitrogen (N2) = 75.52 g Oxygen (O2) = 23.15 g Argon (Ar) = 1.28 g Carbon dioxide (CO2) # ...Post your question