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A 0.0623g sample of cobalt sulfate was dissolved in dilute HCl and treated with 10% BaCl2 solution. The BaSO4 precipitate weighed 0.1075g. Determine the formula of this sulfate of cobalt.
What is the final concentration if 75.0ml of a 3.50M glucose solution is diluted to a volume of 400.0ml
assume that while titration of vinegar sample with standard naoh takes place you misread the buret and the observed
An aqueous solution with a pH of 9.87 is diluted from 1.0 L to 1.5 L. What is the pH of the diluted solution. 4.84 7.07 10.05 10.42 10.78
Would a reaction occur if a piece of Sn metal were placed in a ZnSO4 solution. if so write a net ionic equation
Chemicals available for crystallization: ethyl ether, 95% ethanol, methanol, isopropyl alcohol, aceton, hexane, toluene and methylene chloride.
Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition
The vapor pressure of water at 25 o C is 23.8 mm Hg. a. Write the balanced chemical equation. b. Calculate the mass (in grams) of zinc metal that was consumed in the reaction.
The temperature of a 2.25 L sample of gas decreases from 35C to 20C. What is the new volume?
Acetylene (C2H2) can be produced from the reaction of calcium carbide (CaC2) with water. Draw the localized electron orbital model (hybridized orbital model) for the acetylide anion (C22-), showing ?, ?, and lone pair electron orbital.
The melting point of Ca is 851 C, it's solid state specific heat (Csolid) is ).632 J/g C, and its heat of fusion is 233 J/g. How much energy, in joules, is required to melt 52.0 g of Ca at each of the following initial temps? a) its melting point ..
At a particular temperature the equilibrium constant for the reaction: H2(g) + F2(g) ? 2HF(g) is K = 36.0. A reaction mixture in a 10.00-L flask contains 0.42 moles each of hydrogen and fluorine gases plus 0.15 moles of HF.
0.50 mol of argon gas is admitted to an evacuated container at 20 degrees Celsius. The gas then undergoes an isobaric heating to a temperature of 280 degrees Celsius. What is the final volume of the gas?
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