Question

Need help answering all questions;1,2,3,4,5, and 6

Homework Assignment 1. If 0.623 g of ethane gas (C.H.) is introduced into an evacuate 2.00 L container at 23deg C, what is the pressure in atm in the container? 2. A sample of phosgene (COCI) is collected in a flask with a volume of 247 ml at a pressure of 751 mmHg and a temperature of 21 deg C. The mass of gas is 1.00 g. What is the molar mass? 3. What is the density of carbon dioxide gas at 745 mmHg and 32 deg C? 4. A gas has a density of 1.10 g/L at 27 deg C and 0.750 atm. What is its molar mass? 5. A sample of nitrogen gas has a volume of 3.00 L at 25deg C. What volume will it occupy at 100 deg C if the pressure and amount of gas in constant? 6. A 20.0L gas cylinder contains 4.80 grams of hydrogen gas at 25 deg C. What the pressure of the gas?

Answer 1

Ang :- Weight of a Ho gas 0.6239 Molar mass of Cz Ho = Kate 30 g.m/mo) mole of Co Ho= Weight Molar mass 0.623 30 0.0208 mol Volume of gas = 2:00L Temp 23°c = 296K PV = nRJ Pe NRJ p= 0.0208 X 0.08206 X 296 2 P = 0.253 atm Ang:-2 Volume = 247 mL .2471 P- 751 mm Hg T = 21°C = 294K Weight of gas= 1.004 P V=nRT PV = WORT

WART PV 62:36 X 294X1 751 X 247 W = 98.84 gim./mol Molar mass = 98.84 gim./mol 3. da? P = 745 mmHg T-32°C = 305k Molar mass of CO2 = 44 PV=nRT PV = W RT PW=d RT cl= 745 x44 62:36 X Jos d=1.7235 Yim/Liter de 1.0G.IL T= 27° C = 300k P = 0.750 atml

d=PM RI dRI Р M= HI0 X 300 X 0.08206 0.750 M= 36.1064 gim/mo) [이 V= 3:00L T, = 25°C = 298K V2 = ? Tz = 100°C = 373K charles's law Vi V2 Tz Ti 3 = Vz 373 298 3 -X 373 = 298 Vz V₂ = 3.75 Liter

V = 20.0L Weight of Hy = 4.809 T= 25°C = 298k Molar weight of Hy = 2X1 zglmol P V= nRT Pa W RT N V p= 4.80 X 0.08206 X 298 2 x 20 po 2.934 atm