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For which of the following reactions does delta H reaction = delta H standard H2(g) + S(rhombic) yeilds H2S(g)
A Flask contains 0.320 mol of liquid bromine,Br_2. Determine the number of bromine molecules present in the flask.
a 25g sample of alloy at 95 degrees celsius is placed in 50.g of water at 20 degrees celsius if the final temperature reached by the alloy sample and water is 27 degrees celsius what is the specific heat?
Describe in detail how you would prepare a solution with a concentration near 0.100 M from a 0.650 M stock solution. Calculate the final concentration of the diluted solution (it won't be exactly 0.100 M). It should be within 10% of 0.100 M.
Consider the following reaction: 2H2O (g) + 2SO2 (g) 2H2S (g) + 3O2 (g) a reaction mixture initially contains 2.8 M H2O and 2.6 M SO2. Determine the equilbirum concentration of H2S if Kc for the reaction at this temperature is 1.3 x 10^-6
orbitals in the HCl molecule, taking ?= -1.0 eV and the ionization of energy of atomic chlorine as 13.1 eV.
If a photon has a wavelength of 412.2 nm, what is its energy in J, frequency in s^-1, wavenumber in cm-1, and linear momentum in kg m/s
use the activity series of metals to write a balanced chemical equation for this single replacement reaction
Methylene blue and diphenylbenzidine sulfonic acid are redox indicators that turn from colorless in the reduced state to blue (methylene blue) or violet (diphenylbenzidine sulfonic acid) in the oxidized state. Indicate whether each is a suitable i..
the Na formed during the breakdown of NaN3 reacts with Fe2O3. How many grams of Fe2O3 are needed to react with 35.3 g Na?
Explain the trituration process and why all of the CH2Cl2 solvent must be removed to yield piperine crystals
What is the freezing point of a solution of ethylene glycol (antifreeze), a nonelectrolyte, that contains 140. g of C2H6O2 dissolved in 290. g of water? Use molar masses with at least as many significant figures as the data given.
Determine the numbers of moles of S8 that are required to make 0.600 moles of SF4.
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