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Explain what is the percent mass of calcium in a 1.27-g calcium supplement if 0.44 grams of calcium carbonate was precipitated?
Explain the pH of a solution made by adding 8.80 grams of ammonium chloride to 450mL of 0.105M sodium hydroxide. No change in volume takes place
Explain the meaning of the term condensation reaction in organic chemistry. 3.) explain how you would show experimentally that 2 particular organic compounds were optical isomers of each other.
describe the coordination geometry e.g. octahedral for each metal ion and the mxnlm formula for deoxy and oxy form of
Calculate the cell potential after the reaction has operated long enough for the [Al3+] to have changed by 0.32 mol/L. (Assume T = 25°C.)
The pKa for the protonation of His to form HisH+ = 6.0. When pH = 7.0, what is the fraction of total histidine that will be in the HisH+ form?
The broad feature of the spectrum are therefore expected to be hydrogen-like, the differences arising largely from the mass differences. Predict the wavenumbers of the first three lines of the Blamer series of positronium. What is the binding ener..
The Rydberg constant depends on the mass of the nucleus. What is the difference in wave numbers of the 3p->1s transition in hydrogen and deuterium
The land area of Greenland is 840,000 mi2 with 132,000 mi2 free of ice. The average thickness of ice is 5000 ft. The density of the ice is 0.917 g/ml. Calculate the mass of ice in tons
the experimental density of nickel under normal conditions of temperature and pressure is 8.908 cm^-3. Predict its crystal structure, and use the experimental density to obtain an experimentally-corrected atomic radius.
estimate the enthalpy of vaporization of water 100 degree celcius from its value at 25 degree celcius (+44.01 kJ mol^-1) given the constant pressure heat capacities of 75.29 kJ^-1mol-1 and 33.55 kJ-1mol-1 for liquid and gas, respectively.
Beaker contains aq soln of 6.94*10^-3M NiCl_2. beaker contains aq soln of 2.06*10^-5M Na_2CO_3. the two solns are mixed together (no volume change) if NiCO_3 has a Ksp of 1.42*10^-7 what do you expect to see?
If 0.7438 g of potassium hydrogen phthalate is used and the equivalence point occurs at 33.00 mL of NaOH, calculate the molarity of the NaOH solution to the correct number of significant figures.
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