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5g of Oxygen combines with 37.20g of Uranium to form Uranium Oxide: What percentage (by mass) of this compound is O? and U?
A 3.50g sample of histidine dihydrochloride (fw 228.08g/mol) in water and diluting to a final volume of 50.00ml. The resulting solution is then titrate with 0.500M NaOH. calculate the pH at each of the following points
A cylinder with a piston contains 897 ml of dry oxygen at a pressure of 582 mm Hg and a temperature of 327 K. If the temperature is reduced to 286 K and the pressure increased to 628 mm Hg what is the new volume ?
The Ksp of lead(II) carbonate, PbCO3, is 7.40 × 10-14. Calculate the molar solubility of this compound.
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 ? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5. Enter your answer with 2 decimal places.
At 20 0C and 35 bar pressure, ethane exists as both a liquid and a gas. Use the Redlich-Kwong equation to determine the molar density of the liquid and the gas under these conditions
What is the net redox reaction that occurs when Cu comes into contact with acidic K2Cr2O7? (b) What is the E cell for the reaction
A student has a sample (less than 100 mg) that she would like to test for presence of lead. She has access two different atomic absorption spectrometers (flame and furnace) that could be used for analysis.
Two solutes were used to study diffusion in liquids, methylbenzene, which is a small molecule that can be approximated as a sphere, and a liquid crystal that is long and rod like.
Use the pKa cata to help you predict the products of the reactions. Use curved arrows to show electron flow. Predict whether the equilibrium lies to the left or to the right and calculate the equilibrium constant for the reaction.
A buffer that contains 0.55 M base, B, and 0.30 M of its conjugate acid, BH+, has a pH of 8.94. What is the pH after 0.0020 mol HCl is added to 0.25 L of this solution.
How many grams of sodium formate, NaCHO2, would have to be dissolved in 1.1 L of 0.20 M formic acid (pKa 3.74) to make the solution a buffer for pH 3.82
What is the theoretical yield (in g of precipitate) when 16.3 mL of a 0.586 M solution of barium hydroxide is combined with 18.7 mL of a 0.688 M solution of iron(III) nitrate
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