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The decomposition of substance A to produce products is first-order with a rate constant of 3.34 x 10-3/min. If the initial concentration is 4.11 x 10-4 mol/L, what is the molar concentration of A after 108 min?
1.70 x 103 mol/L
0.697 mol/L
2.46 x 10-4 mol/L
2.87 x 10-4 mol/L
2.13 x 10-4 mol/L
2.62 x 10-4 mol/L
What combination of a molecular base and a salt of the conjugate acid of the chosen molecular base should you select to prepare a buffer solution that would maintain a pH of 10.00?
For a particular reaction, deltaH is -93.8kJ and deltaS is -156.1 J/K. Assuming these values change very little with temperature, over what temperature range is the reaction spontaneous in the forward direction?
Determine the value of the equilibrium constant at this temperature - Ammonium Hydrosulfide NH4HS yields NH3(Ammonia) and Hydrogen sulfide
Write balanced chemical equation and evaluate the molecular weight of the reactants and Calculate the molecular weights of the reactant.
Volume of water used, mL: 75.0ml Initial temperature of water: 23.4 degree celsius Mass of salt taken, g: 5g Moles of salt taken, mol: 0.0625mol Highest/lowest temperature,: 24.0/20.1 Calculate heat flow,J and calculate the Enthalpy change,KJ/mol:..
If the solubility producet Ksp for silver phosphate is 1.8x10^-18, what is the molar solubility of silver phosphate in water at the same temperature
If a sample of pure silver (Ag) contains 3.35 x 1022 atoms of silver, how many moles of silver are in the sample?
A steel cylinder of oxygen has a volume of 20.0 L at 22degrees C at 35 atm. What is the volume at STP? How many mol of oxygen
A 275 mL sample of vapor in equilibrium with 1-propylamine at 25.0C is removed and dissolved in 0.500L of H2O.For 1-propylamine, pKb= 3.43 and the vapor pressure = 316 torr.
A bottle of nail polish remover contains 182 mL of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788mL.
Calculate the pH of a buffer solution that is 0.250 M in HCN and 0.170 M in KCN. For HCN, Ka = 4.9 x 10^-10 (pka = 9.31). Use the equilibirum approach to calculate this pH
If ammonia was added to a saturated solution of copper(II) iodate in a equilibrium with its precipitate, would the copper ion concentration increase, decrease, or stay the same. Why
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