Question

6. ) A sample of methane gas, CH4, at 322.0 degrees celcius and a pressure of 662 mmHg had a volume of 36.4 L. What would be the volume of the gas at STP

7.) The CO2 gas that was evolved during the fermentation of sugar was collected. After purification its volume was measured as 25.0 L at 22.5 Celcius and 702 mm Hg. How many moles of the CO2 gas were collected ?

8.) Commercially, compressed oxygen is sold in metal cylinders. If a 120. L cylinder is filled with oxygen to a pressure of 125.0 atm at 25.0 Celcius, find the mass of the O2 gas present in grams.

9.) What is the density of Ar gas, in units of g/L, at a pressure of 662 mm Hg and a temperature of 25.0 Celcius ?

10.) In a Dumas experiment to determine the molar mass of a substance, it was found that a 4.00 gram of the vapour occupies 250.0 mL at STP. Calculate the molar mass of the substance.

11.) What volume of oxygen gas, O2 at 320 K and 680 torr will react completely with 2.50 L of NO gas at the same temperature and pressure ?

2 NO(g) + O2(g) --> 2 NO2

Answer 1

8५ ।dea १ ৭% {१८১, PV= n RT P V ২T ০. ৪ ৭ 1 ৭) Hक९, ) ৫42 Mn g = ২ P 1 न-6 ० R: ৩. ০৪২) L৭n०l 36.५L 3২২° = (3২২ + ২৭3)K = 53S K 17 ০.৪ न। ৭h X 36.५L n O- 65 mol Latm xS95 K পo]k 6.০৪২। then, at STP, १ = 19 : ২৭3K ++en, ২न३ Latm X Mol K ৩.6Smo) X 0.০৪২। K | ৭M १|v০)५० 1५.ऽ+ ।