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A gas sample has an original volume of 500 ml when collected at 730 mm and 20oC. What will be the volume of the gas sample if the pressure increases to 800 mm and the temperature increases to 40oC? A gas sample has an original volume of 650 ml when collected at 750 mm and 30oC. If a change is made in the gas temperature which causes the volume of the gas sample to become 800 ml at 1.00 atm, what is the new temperature? A sample of CO2 gas which weighs 0.85 grams has a volume of 1.30 liters when collected at 30oC. What would be the pressure of the gas sample?
74.0 mL of a 1.80 M solution is diluted to a volume of 268 mL. A 134-mL portion of that solution is diluted using 179 mL of water. What is the final concentration.
Potassium nitrate has a lattice energy of -163.8 kcal/mo land a heat of hydration of -155.5 kcal/ mol. How much potassium nitrate has to dissolve in water to absorb
A 130 mL stock solution contains 1.3 M Na3PO4. When 10 mL of the stock solution is diluted to 21 mL, what will the concentration of Na+ ions be?
What volume of 0.2500 M cobalt(III) sulfate is required to react completely with a) 25.00 mL of 0.0315 M calcium hydroxide?
What mass of rm KCl is needed to precipitate the silver ions from 15.0 mL of 0.190 M rm AgNO_3 solution?
Calculate the concentrations of all species in a 1.10 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1=1.4x10^-2 and Ka2=6.3x10^-8.
Identify the most stable arrangement of the regions of high electron density. Diagram and name the type of structure that the molecules has based on positions of the atoms.
The equilibrium constant for the reaction of bromine with chlorine to form bromine monochloride is 58.0 at some temperature. Br2(g) + Cl2(g) ! 2 BrCl(g) What is the value of the equilibrium constant for the following reaction?
What is the mole fraction of HO2CCH2CHOHCO2H in this solution suppose you dissolve 2.56 grams of malic acid HO2CCH2CHOHCO2H in 50.0 grams of H 2 O.?
Mass spectroscopy indicates the molar mass to be about 162 g/mol. What is the molecular formula of the unknown compound?
Find the pH of a solution that has a weak acid concentration of 1.72 M and a weak base concentration
find the ph of the solution at the following points in the titration: a) before any base is added b) when half the acetic acid has been neutralized c) at the equivalence pt.
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