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For the equation 3Fe+4H2O=4H2+Fe3O4 If 625 g of Fe3O4 is produced in the reaction, how many moles of hydrogen are produced at the same time?
what mass of Cu is electroplated by running 20.0A of current through
A sample of nitrogen gas is contained in a piston with a freely moving cylinder. At0?C, the volume of the gas is 248 mL. To what temperature must the gas be heated to occupy a volume of 479mL.
Balance the following reaction: Manganese(V) sulfate reacts with chromium(III) sulfate and water to give manganese(II) sulfate, chromium(VI) oxide
consider an excited-state hydrogen atom. What is the energy of the electron in the n = 3 level? ground state energy
How much heat is lost when a 640 g piece of copper cools from 375 oC, to 26 oC? (The specific heat of copper is 0.387 J/g . oC)
A student takes 195. g of BaCl2, and reacts it according to the following equation: 3BaCl2 + Al2(SO4)3 → 3BaSO4 + 2AlCl3 How many moles of AlCl3 are formed?
Draw the structures of all monofluoro derivatives of methylcyclopentane, C6H11F, which have the fluorine on a secondary carbon
A hot air balloon is filled with 1.51 x 10^6 L of an ideal gas on a cool morning (11 C). The air is heated to 125 C. What is the volume of the air in the ballon after it is heated? Assume that noen of the gas escapes from the balloon.
If a diagnostic test starts with 15mCi of Ga-68, how much is left after the test if the test runs for 2 hr and 15 minutes?
Consider the reaction between 50.0 mL of 0.200 M sodium hydroxide and 75.0 mL of 0.100 M HCl at 25 degrees Celsius. Which of the following is true?
calculate the density and # of moles of a 10% Bromine Solution used in an experiment. Does the 10% refer to v/v or g/v in solution? I used 350 ul of the Bromine Solution
For the complete neutralization reactions between the following pairs of acid and bases, which pair is a soluble, strong base and a weak acid that react to form an insoluble salt?
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