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A 2.50 L flask at 17.0 degrees Celcius contains a misture of three gases, N2, He, and CO2, at partial pressures of 0.32 atm, 0.25atm and 0.40atm respectively. a. calculate the total pressure of the gas mixture b. calculate the volume, in litres at STP, occupied by the N2 and He if the CO2 was selectively removed.
In a seperate trial the student puts 214 mL of the same liquid into the same flask at the same conditions. What will the pressure measure (in kPa) in the second trial?
3.953g of egg shell was reacteed with 50ml of 0.1 mol/l hcl and shel contains ca2co3 after all the sheell reacted resultign solution was placed in a columetric flask and th colume made up to be 100ml.
A stock solution is prepared by adding 20 mL of 1.21 M AlCl3 to enough water to make 72 mL. What is the Al3+ concentration of 30 mL of the stock solution
What is the concentration of HNO3 if 9.20×10?2 mol are present in 825 mL of the solution
A 100.0 mL sample of 0.10 M NH3 is titrated with 0.10 M HNO3. Determine the pH of the solution after the addition of 50.0 mL of HNO3. The Kb of NH3 is 1.8 × 10-5.
For the following, identify the process as a spontaneous process, a nonspontaneous process, or an equilibrium process at the specified temperature.
your chemiluminescence reaction will actually occur very slowly in air. what component of air will bring about this
Describe the bond angles to be found in each of the following molecular structures: (a) Planar trigonal (b)tetrahedral (c) octahedral (d) linear
Which of the following is both a decomposition reaction and a reduction-oxidation reaction? a. H2CO3(aq) --> Co2(g) + H2O(l) b. Zn(s) + SuNO3(aq) --> Cu(s) + ZnNO3 (aq) c. Ca(OH)2(aq) + 2HCl(aq) --> CaCl2(aq) + 2H2O(l)
What mass (in grams) of solid Na2SO4 would need to be added to 250 grams of water to make an ideal solution with a boiling point of 103.6°C? (Kb for water is 0.512°C/m)
explain the difference in boiling point between the isomers 1-chlorobutane and 2-methyl-2-chloropropane in terms of structure.
How do you who that both ZnS and CuS will precipitate at pH8. 2) Show that only CuS will precipitate when (H3O+) = 0.3M
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