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A 167-L cylinder of helium gas has a pressure of 74.9 atm at 296 K. If 426.2 g of helium are removed from the tank, what is the new pressure of the gas? (R = 0.08206 L atm K-1 mol-1):A) 59.4 atmB) 62.0 atmC) 15.5 atmD) 12.9 atmE) 74.9 atm
Show how all four hydrogens in sodium borohydride can act as a reducing agent hydride. What is the minimal amount of NaBH4 is needed for reduction of 1 mole of aldehyde.
If you have 330 ml of water at 25 degrees and add 110 ml of water at 95 degrees, What is the final temperature of the mixture.
Identify the following compound from its IR and proton NMR spectra. C6H10O: NMR: ? 3.31 (3H, s); ? 2.41 (1H, s); ? 1.43 (6H, s) IR: 2110, 3300 cm-1 (sharp)
Nitrogen and hydrogen combine to form ammonia in the Haber process. Calculate (in kJ) the standard enthalpy change ?Hº for the reaction written below, using the bond energies given.
Cobalt Chloride in varying concentrations Spectrophotometer set to a Wavelength = 510 nm % Transmission = experiment #1 = 31.62, experiment #2 = 89.13 and experiment #3 = 98.86
Given the following balanced equation: TiCl4 + 4NaH --> Ti + 4NaCl + 2H2. How many grams of NaCl will be produced from 15.0 g TiCl4 by using sufficent NaH
Calculate the mean free path and the binary number of collisions per liter per second between HI molecules at 300 K and 1.00 atm. The collision diameter of the HI molecules may be taken to be 5.10 A. Assume ideal-gas behavior.
if you burn 51.8 g of hydrogen and produce 463g of water, how much oxygen reacted?
If the pH probe was miscalibrated and reports the pH and reports the pH to be 1 unit higher than the true pH of the solution it is in, would the molar mass you report for the solid acid be higher than
Write balanced reaction equations for the two steps in the synthesis of 2-butoxynaphthalene.
Chemically equivalent amounts of ferric and stannic ions, iron(III) and tin(IV) respectively, are mixed in solution. Calculate the redox potential.
Describe the technique used to determine the density of approximately 5 gram samples of the following at 20 degrees C and 1 atmosphere pressure: A) Gasoline B) Granular Sugar C) A lump of gold D) Mercury
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