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Compute the volume (in mL) of a 0.690 M KOH solution that must be added to 4.000 g of HEPES to give pH of 7.96
What percentage of the original Ag+ remains in solution when 180 mL 2.10×10-2 M AgNO3 is added to 240 mL 3.76×10-2 M K2CrO4 ?
A balloon holds 2.5 liters of helium at a temperature of 25C and 1 atmosphere of pressure. What volume will the balloon have after it rises to where the atmospheric pressure is 0.8 atmosphere and the temperature is -10C
One of the nuclides in spent nuclear fuel is U-235 , an alpha emitter with a half-life of 703 million years. How long will take for the amount of U-235 to reach 49.0% of its initial amount
Compute the work done by the system as a result of the reaction. The atmospheric pressure is 1.1atm as well as the temperature is 23oC. Presume perfect gas behavior and the hydrochloric acid is in excess.
changes the freezing temperature of the camphor by -2.10°C. Given camphors freezing-point depression constant of -37.7°C/m, calculate the molar mass of estradiol.
How many moles of Al(OH)3 are produced when 50.0 g of KOH react completely in the following equation? AlCl3 + 3KOH = Al(OH)3 + 3KCl
When heated gently with methanol, compound B, C5H8O4, is obtained. Compound B has IR absorptions at 2500-3000 (broad), 1730, and 1701 cm-1, and its proton NMR spectrum in D2O consists of resonances at d 2.7
Calculate the Ksp for Na2B4O5(OH)4 from this data. d. What is the free energy change for the dissolution of Na2B4O5(OH)4 at this temperature?
Use the subsequent equations to compute the molar enthalpy of formation for manganese (IV) oxide, MnO2(s). 2MnO2(s) → 2MnO(s) + O2(g) ΔH = 264kJ
Calculate the solubility of copper (II) iodate in 0.56 M copper (II) nitrate. Ksp* is 7.4x10-8 M3.
Element symbols and Chemical formulas - What is the total number of atoms found in each of the following compounds? What is the total number of elements found in each?
three gases nitrogen helium and krypton are confined in a 4.00 l vessel at a pressure of 14.0 atm. the vessel contains
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