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1) Calculate the ratio of CH3NH2 to CH3NH3Cl required to create a buffer with pH=10.26
Part A: What is the pH of a buffer prepared by adding 0.405mol of the weak acid HA to 0.608mol of NaH in 2.00L of solution? The dissociation constant Ka of HA is 5.66e-7
Part B: What is the pH after 0.150mol of HCL is added to the buffer from part A? Assume no volume change on the addition of the acid.
Part C: What is the pH after 0.195mol of NaOH is added to the buffer form part A? Assume no volume change on the addition of the base
is believed to follow the mechanism H2O2 + I- ? H2O + IO- fast H2O2 + IO- ? H2O + O2 + I- slow At 25oC, the first step is fast relative to the second step. What is the rate law predicted by this mechanism?
Calculate the volume in liters occupied by 0.350 moles of propane gas at a pressure of 0.850 atmospheres
What is the equilibrium constant for K2CrO4 and what is the equilibrium constant for K2Cr2O7?
If the gas is at 23C and 1.0 atm, what mass of helium is in the blimp? The Goodyear blimps, which frequently fly over sporting events, hold approximately 1.85×105 ft^3 of helium.
Write structures for all the structural isomers of double-bonded compounds with the molecular formula C5H10. Of the compounds
Explain why the C=C stretching mode gives rise to a rather weak IR band in 1-methylcyclohexane
if the initial [H2] = 0.200M, [I2] = 0.200M and Keq = 55.6 at 250°C calculate the equilibrium concentrations of all molecules.
Tf will be negative and so you must use negative Kf values. Either way, the freezing point of the solution should be lower than that of the pure solvent. Assuming 100% dissociation, Find the freezing and boiling points of 1.85 m Na2SO4(aq).
Therefore an answer in U.S. customary units, such as miles per hour would not be accepted as correct. A car traveling with constant speed travels 150 km in two hours. What is the speed of the car?
How many grams of water are needed to react with 78.0g CaCN2? How many grams of NH3 are produced from 5.19g CaCN2?
The standard molar heat of fusion of ice is 6020 J/mol. Calculate q, w, and E for melting 1.00 mol of ice at 0C and 1.00 atm pressure.
A solution of 2.40 grams of the unknown hydrocarbon dissolved in 26.7 grams of naphthalene is found to freeze initialy at 76.2 Degree Celsius. Caluculate the apparent milar mass of the unknown hydrocarbon on the basis of the freezing-point depress..
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