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1) Frank and Oswalt report a molar absoptivity of 4700 L mol -1 cm-1 for the thiocyanatoriron(III) ion. What % T would you expect for a solutions that is 1.0x10-4 M in thiocyanatoiron(III) ion, if the path length is 1.00 cm?
2) At a given temperature, the equilibrium constant for the system studied in this experiment is 1.40x102. Suppose 100.0 mL of 2.00x10-3 M KSCN was mixed with 100.0 mL of 2.00x10-3 M Fe(NO3)3. At equilibrium, what molar concentration of the thiocyanatoiron(III) ion would you expect?
It takes 54.0 J to raise the temperature of an 10.3g piece of unknown metal from 13.0C to 25.0 C. What is the specific heat for the metal?
Calculate the mass of Cu(NO3)2·3H2O needed to prepare 50.0mL of a 0.50 M Cu(II) solution?
Suppose a snack bar is burned in a calorimeter and heats 2,000 g water by 20 °C. How much heat energy was released? (Hint: Use the specific heat equation.) Give your answer in both joules and calories.
an evacuated empty 276 ml glass bulb weighs 129.6375 g. filled with an unknown gas the bulb weighs 130.0318 g.
At 320 K and 16 atmospheres, the molar volume of ammonia (NH3) is about 10 % less than that of an ideal gas. Explain this observation.
Choose the element with more negative (more exothermic) electron affinity from each of the following pairs.
What volume of glacial acetic acid (1.06g/ml) and what weigh of solid potassium acetate are required to prepare 5 liters of 0.2m acetate buffer, ph 5.0
For the reaction CH4+202=2H2O+CO2, calculate the percent yield of carbon dioxide if 1000. g of methane react with excess oxygen to produce 2300. g of carbon dioxide.
For which of the following equilibria does Kc correspond to an acid-ionization constant, Ka? NH3(aq) + H3O+(aq) NH4+(aq) + H2O(l) NH4+(aq) + H2O(l) NH3(aq) + H3O+(aq) NH4+(aq) + OH-(aq) NH3(aq) + H2O(l) HF(aq) + OH-(aq) H2O(l) + F-(aq) F-(aq) + H2..
The molecule C3H6F2 can exixt in three isomeric forms.(the three carbons are central atoms ,and the H and F atoms are bonded to the carbons.) Write the lewis formulas of the trhee isomers, predict their VSEPR geometries and sketch their molecular ..
write the net ionic equation for any precipitation reaction that may be predicted by the solubility rules on the
The Ksp value for the dissociation of barium nitrate is 0.00464. The molar solubility of barium nitrate is consequently 0.105 M. If the concentration of the barium ion in a saturated solution of barium nitrate was raised to 0.178 M (this is not th..
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