Answer:
The molar mass is the mass of a given chemical element or chemical compound (g) divided by the amount of substance (mol). The molar mass of a compound can be calculated by adding the standard atomic masses (in g/mol) of the constituent atoms.
Explanation:
To find density, we have to solve the equation for volume, or V. V = nRT / P. To incorporate mass, we can use the number of moles, or n. The number of moles equals the mass of the gas10.19 The typical atmospheric pressure on top of Mt. Everest (29028 ft) is about 265
torr. Convert this pressure to
(a) atm 265 torr ( 1 atm / 760 torr) = 0.349 atm
(b) mm Hg 265 torr ( 760 mm Hg / 760 torr) = 265 mm Hg
10.39 A scuba divers tank contains 0.29 kg of O2 compressed into a volume of 2.3 L.
(a) Calculate the gas pressure inside the tank at 9 °C.
PV = nRT so P = nRT / V
convert 0.29 kg to 290 g O2
convert 9 °C to K [9 °C + 273.15 = 282.15 K ] (do not pre-round)
290 g O2 ( 1 mol O2 / 32.00 g ) (0.0821 L atm / mol K) (282.15 K)
P = ------------------------------------------------------------------------------------- = 91 atm
2.3 L ( 2 SF)
10.41 Chlorine is widely used to purify municipal water supplies and to treat swimming
pool waters. Suppose that the volume of particular sample of Cl2 gas is 8.70 L at 895 torr divided by the molecular mass.
