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Calculate Delta Hrxn for the following reaction: Fe2O3 (s) + 3CO (g)-----> 2Fe (s) + 3CO2 (g). Use the following reactions and given delta H's. 2Fe (s) + 3/2O2 (g)----->Fe2O3 (s), Delta H= -824.2 kJ CO (g) + 1/2O2 (g)----->CO2 (g), Delta H=-282.7 kJ
What is the rate constant of a first-order reaction that takes 215 for the reactant concentration to drop to half of its initial value?
A solid object is made of two materials, one material having density of 2.4 g /cm3 and the other having density of 8.6 g/cm3. If the object contains un-equal masses of the materials (75/25), what is its average density
What is the value of Kc if the extent of dissociation in 0.100M lactic acid is 3.65% at 25 Degree C?
Calculate the volume occupied by 1.00 mol N2 using the van der Waals equation in the form of a virial expansion at (a) its critical temperature, (b) its Boyle temperature, and (c) its inversion temperature
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.
Consider a process carried out on 1.00 mol of a monatomic ideal gas by the following pathway from state A to state B
what is the mass in grams of a single atom of Ru. The answer is supposed to be in scientific notation as in blank time ten^ blank. I kinda have an idea but not sure
calculate the number of microstates, W, that have this energy. Make sketches of these microstates. Calculate the corresponding entropy for each state.
A sample of glucose, C6H12O6, contains 1.265 x 1021 carbon atoms. (a) How many atoms of hydrogen does it contain?
How much water must be added to 534. mL of 0.180 M HCl to produce a 0.135 M solution? (Assume that the volumes are additive.)
which caused the CO2 in the sample to precipitate as BaCO3. The excess base was back-titrated to a phenolphthalein end point with 23.6ml of .0108 M HCl. What is the concentration of CO2 in the air in parts per million? use 1.98g/L for the density ..
What is the boiling point of a solution of benzene containing 0.2 moles of a non volatile solute in 125 grams of benzene given that pure bezene has a boiling point of 80.1
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