Reference no: EM132252002
1. The stopcock connecting a 2.11 L bulb containing helium gas at a pressure of 2.74 atm, and a 3.18 L bulb containing nitrogen gas at a pressure of 3.59 atm, is opened and the gases are allowed to mix. Assuming that the temperature remains constant, the final pressure in the system is ___ atm.
2- A mixture of oxygen and krypton gases is maintained in a 5.54 L flask at a pressure of 2.57 atm and a temperature of 39 °C. If the gas mixture contains 6.53 grams of oxygen, the number of grams of krypton in the mixture is ___ g.
3- What volume of oxygen gas is produced when 26.1 g of mercury(II) oxide reacts completely according to the following reaction at 25 °C and 1 atm?
mercury(II) oxide (s) mercury (l) + oxygen(g)
___ liters oxygen gas
4- How many grams of phosphorus (P4) are needed to completely consume 9.19 L of chlorine gas according to the following reaction at 25 °C and 1 atm?
phosphorus (P4) ( s ) + chlorine ( g ) phosphorus trichloride( l )
___ grams phosphorus (P4)
5- A sample of an unknown gas is found to have a density of 0.854 g/L at a pressure of 0.575 atm and a temperature of 38 °C. The molar mass of the unknown gas is ____g/mol.
6- A 3.81 gram sample of an unknown gas is found to occupy a volume of 2.22 L at a pressure of 703 mm Hg and a temperature of 33 °C. The molar mass of the unknown gas is ___ g/mol.