Answer the three questions below. Dentists sometimes use laughing gas (dinitrogennonoxide, N0(g)) as a mild anaesthetic to keeppatients relaxed during dental procedures. A cylinderuf laughing gas has a diameter of 23.0 cm and a heightof 140 cmm. The pressure is 108 kPa and the temperatureis 294 K. How many grams of laughing gas are in thecylinder?What is the volume occupied by a 1.25g sample ofhelium al STP? What is the density of helium at STP? A sample of an unknown gas was collected in an emptysyringe of known mass under vacuum conditions. Thegas was then transferred to a flexible container andheated so that the volume of the gas could be measuredmore accurately.a) Usc ihe following data to lind the molar mass andthe molur votume of the unknown gas:Mass of syringe and gas = 2.201 gMass of empty syringe = 2.150 gPressure = 102 kPaTenperature = 50.0°CVolume of heated gas = 664 ml,b) What is the likely identity of the gas?

(1) Given - diameter of cylinder = 23.0 cm Height of cylinder = 140 cm Pressure = 108 kPa = 1.066…

Dentists sometimes use laughing gas (dinitrogen nonoxide, N0(g)) as a mild anaesthetic to keep patients relaxed during dental procedures. A cylinder uf laughing gas has a diameter of 23.0 cm and a height of 140 cmm. The pressure is 108 kPa and the temperalur is 294 K. How many grams of laughing gas are in the cylinder? What is the volume occupied by a 1.25g sample of helium al STP? What is the density of helium at STP?