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QUESTION 1 The gas-phase dipole moment of the hydroxyl radical, •OH, is 1.66 D, and the bond length for this species is 97.1 pm. Use this information to calculate the percent ionic character of the O-H bond. 1- Charge in esu: 2- Charge in e- 3- Percent ionic character of the O-H bond:
Sulfurous acid, H2SO3, is a weak diprotic acid (pKa,1=1.89 and pKa,2=7.21 at 25oC). What is the pH of 0.121 mol/L H2SO3(aq) at 25oC
A 25.00 mL aliquot of iron solution was titrated to equivalence with 26.19 mL of 0.0215 M KMnO4. A procedure similar to the one in experiment 7 was followed. Calculate the moles of iron in the original volumetric flask.
An aluminum foil package contains 75 square feet of foil that weighs 12 ounces. Aluminum has a density of 2.70 g/cm^3. What is the approx thickness of the foil in mm
that the reaction was endothermic. If the enthalpy of reaction is negative, then we say that energy was released or that the reaction was exothermic. Most chemical reactions are exothermic.
calculate the mass in grams for a gold sample that absorbs 210 j to change its temperature from 13.0 c to 53.0
given that the solubility of o2 in water at 0 degrees c is 14.7ppm calculatenbspa the concentration of dissolved o2 in
A 0.2088g sample of an unknown monprotic acid is titrated with 22.10 ml of 0.1000 mol/L KOH. The pH of the solution after the addition of 22.10 ml of base is 5.02. What is the Ka for the acid?
The Party Guy, Mr. Balloon, is making animal figures out of long thin balloons that he twists into different shapes. Assume that the balloons are of uniform thickness.
Hydrogen iodide decomposes according to the equation: 2HI(g) H2(g) + I2(g) Kc = 0.0156 at 400°C. A 0.57 mol sample of HI was injected into a 2.0 L reaction vessel held at 400°C. Calculate the concentration of HI at equilibrium.
The aspirin componet weighs only 250mg. What is the w/w% aspirin inthe time release tablet?
If the Ksp of KHT was determined experimentally to be 3.8E-4 at 25 C, calculate the mass of KHT needed to make 200 mL of saturated solution.
How many milliliters of 5 M NaCl are required to prepare 1500 mL of 0.002 M NaCl. What will be the concentration of the diluted solution expressed in millimolars, micromolars, and nanomolars.
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