Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Dalton's Law chem questions. Help, please?
1) 100 ml of hydrogen are measured over water at 16 C and 744 torrs. Calculate the volume when dry and at STP
2) Hydrogen gas and helium exert a combined pressure of 4.5 atm. If hydrogen's partial pressure is 150 kPA, what is the pressure of the He. gas?
3) 300 mL of H2 and 200 mL of F2 exert a total pressure of 1500 mmHg. What is the PH2 and PF2?
___________________
Could somebody please explain HOW to go about such problems?
2 Answers
- skipperLv 71 decade agoFavorite Answer
1) Collected over water so the pressure must be reduced by the vapor pressure of water at 16 deg C (13.6 mm Hg)
P = 744 mm Hg - 13.6 mm Hg = 730 mm Hg = 0.9605 atm
V = 0.100 L
n = PV/RT = 0.9605 x 0.100 / (0.08206 x 289)
n = 0.00405 moles of H2
1 mole at STP = 22.4 L
0.00405 moles at STP = 22.4 L x 0.00405 = 0.0907 L
H2 volume at STP = 90.7 mL
- jitendraLv 44 years ago
this question makes use of boyle's regulation it extremely is P1V1=P2V2 a million) handle the counsel you have P1= a million.08 atm V1=5.00 L P2= ? v2= 10.0 L 2) plug those into the boyle's regulation formulation (a million.08 atm) (5.00 L) = (P2)(10.0 L) 3) multiply and remedy to your answer: a million.08 x 5.00 = 5.4, divide 5.4 through 10.0L which equals 0.fifty 4 P2= 0.fifty 4 is your very final answer different gas regulations are: charles regulation - V1/T1= V2/T2 (quantity over temperature) gay-lussac - P1/T1=P2/T2 (tension over temperature) perfect gas - PV=nRT (P=tension. V=quantity, n=form of moles of gas, R= gas consistent), T=temperature