Estimate the number of atoms in the body of a 50 kg physics student. Note that the human body is mostly water, which has molar mass 18.0 g/mol, and that each water molecule contains three atoms.

(a) An ideal gas occupies a volume of 2.6 cm3 at 20°C and atmospheric pressure. Determine the number of molecules of gas in the container. molecules (b) If the pressure of the 2.6-cm3 volume is reduced to 2.2 ✕ 10−11 Pa (an extremely good vacuum) while the temperature remains constant, how many moles of gas remain in the container? mol

3) In a cylinder 6 moles of natural gas (M-19.09 x 10* kg/mole) is at 40°C temperature. Calculate for the gas: (R-8.31 J/kg-mole K and KB -1.38 x 10-3 J/K) (a) the average kinetic energy of a molecule, (b) the total random kinetic energy of all the molecules, and (c) the rms speed of a molecule