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The black oxide of iron, Fe3O4, occurs in nature as the mineral magnetite. This substance can also be made in the laboratory by the reaction between red-hot iron and steam according the following: 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g).
(a) When 36.0 g H2O are mixed with 67.0 g Fe, which is the limiting reagent?
(b) What mass in grams of black iron oxide is produced?
(c) What mass in grams of excess reactant remains when the reaction is completed?
What quantity of heat is required to change 40.0 g of ice at melting point to liquid water? The heat of fusion of ice is 335 J/g. The answer should be 13400 J Please include steps in solving
Draw a flow diagram simply showing how to separate a neutral organic compound from an organic acid and purify both.
A solution of Na3PO4 is added dropwise to a solution that is 0.0494 M in Ag+ and 0.00318 M in Cu2+. The Ksp of Ag3PO4 is 8.89e-17. The Ksp of Cu3(PO4)2 is 1.4e-37. (a) What concentration of PO43- is necessary to begin precipitation
A certain sunstance, intially present at 0.0800 M, decomposes by zero-order kinetic with a rate constant of 2.50 x 10-2 mol/l s. Calculate the time (in seconds) required for the system to reach a concentration of 0.0630
What is the genotype distribution for VNTRs? How many alleles do you think are present in the students' population
The value of ?G° for a reaction conducted at 25 °C is 2.8 kJ/mol The equilibrium constant for a reaction is at this temperature
What is meant by the term reaction rate? Name three factors that can affect the rate of a chemical reaction. Is the rate of disappearance of reactants always the same as the rate of appearance of products? Explain.
What volume of a 0.750 M solution of hydrochloric acid can be prepared from the HCl produced by the reaction of 25.0 g of NaCl with an excess of sulfuric acid
calculate the Kf for the solvent bromoform: When 28.2 g of C20H42 are dissolved in 173. mL of bromoform, the freezing point of the solution is 5.4 C.
Write an abstract for the Gravimetric Determination of Calcium experiment you just completed using the guidelines below. Because of the simplicity of the experiment performed, your abstract should be between 150 and 250 words, which is less than t..
A 15.8 g sample of a nonelectrolyte was dissolved is 104.0 g of water. The solution's freezing point was -1.9°C. What is the molar mass of the unknown compound?
Carbon monoxide and water vapor, each at 190 Torr, were introduced into a 250 mL container. When the mixture reached equilibrium at 690 ?C, the partial pressure of CO2(g) was 108 Torr.
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