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Calculate the concentrations of all species in a 0.690 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1=1.4x10^-2 and Ka2=6.3x10^-8.
Magnesium carbonate was added to 25cm cubed of 2.0 mol/dm cubed of nitric acid. All the nitric acid is used up in the reaction. Calculate the volume of gas obtained in the reaction.
Calculate the amount of work done against an atmospheric pressure of 1.00 atm when 500.0 g of zinc dissolves in excess acid at 30.0°C.
Hydrocarbons are often reacted with steam to form H2, as shown for propane. Calculate Kp for this reaction at a particular temperature, given:
What is the purpose of anhydrous CaCl2? Why it is important that none of the solid CaCl2 be included in the final distillation of your 1-bromobutane?
A solution containing 3.47mM X (analyte) and 1.72 mM S (standard) gave peak areas of 3473 and 10222, respectively, in a chromatographic analysis. Then 1.00ml of 8.47mM S was added to 5.00ml of unkno
The Henry's Law constant (k) for carbon monoxide in water at 25ºC is 9.71 x 10-4 mol/(L•atm). How many grams of CO will dissolve in 1.00 L of water if the partial pressure of CO is 2.75 at
The concentrations of both H2(g) and F2(g) are found to be 0.0050 M. What is the concentration of HF(g) in the equilibrium system under these conditions?
Silver nitrate and sodium phosphate are reacted in equal amounts of 200. g each. How many grams of silver phosphate are produced?
When balancing the equation using half reactions why is the half reaction of the reduction of the chromate ion written Cr2O7---->Cr3+ instead of Cr2O7---->Cr2O4 How would I write the final bal
Calculate the concentration of bicarbonate ion, HCO3 -, in a 0.010 M H2CO3 solution that has the stepwise dissociation constants Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11.
When 2.45 g of an unknown weak acid (HA) with a molar mass of 85.0 g/mol is dissolved in 250.0 g of water, the freezing point of the resulting solution is -0.255 C. Calculate Ka for the unknown wea
When metabolized, an orange provides 445 kJ of energy. What mass of water could this amount of energy raise from 25.0 degrees calcius to the boiling point?
1. How could you separate barium sulfate, BaSO4, from (NH4)2CO3? 2. How could you separate zinc chloride, ZnCl2, from zinc sulfide,ZnS?
Calculate the pH of the final solution. A solution is made by dissolving 25.6 g of NaOH in approximately 450 mL of water in a volumetric flask. The solution becomes quite warm, but after it is allo
A 27.0 g sample of an unknown carbon-hydrogen compound was burned in excess oxygen to form 88.0 g of CO2. What is a possible molecular formula of the hydrocarbon?
A solution containing 3.47mM X (analyte) and 1.72 mM S (standard) gave peak areas of 3473 and 10222, respectively, in a chromatographic analysis. Then 1.00ml of 8.47mM S was added to 5.00ml of unkn
If the height of the mercury column in the leveling bulb is 30mm greater than that in the gas buret and the atmospheric pressure is 670 mm, what is the pressure on the gas trapped in the buret?
The rate of a first order reaction is 4.6 x 10 to the -4 power at 638K. If the activation energy is 104 kj/mol, calculate the temperature in K at which the rate constant is 8.80 x 10 to the -4 power
p-dichlorobenzene (designated B) gave the relative detector response (peak area of A)/(peak area of B) = 0.71 in a chromatography experiment. A solution containing an unknown quantity of A plus 930
A calorimeter consists of metal parts with a heat capacity of 850.0 J K-1 and 1100 g of oil with a specific heat of 2.184 J g-1 K-1. What is the heat capacity of the entire assembly?
A 0.050M solution of glycerine, C3H8)3, and a 0.050M solution of lycine, C5H11NO2, are prepared. Which solution contains the most dissolved molecules per litre?
How does the strngth of the attraction between water molecules and sodium and chloride ions compare with the strength of the attraction between the sodium ions and chloride ions? How do you know?
The GPR (Ground Penetrating Radar) produced an electromagnetic radiation that had a frequency of 2.00 X 102 MHz. Determine the amount of energy (Kj) in this radiation.
Determine the values of q, w, ?U, ?H, ?S, ?Stot and ?G for each stage of the cycle and for the cycle as a whole. Express your answer as a table of values.