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Barium Chloride was precipitated with certain metal sulfate. The PPT was washed and ignited to remove impurities. The amount of Barium sulfate obtained was 10g. What weight of the sulfate ion was used?
What volume of 3M H2SO4 is needed to neutralize all of the disodium salicylate and the excess NaOH present after the initial reaction. How much sulfuric acid was in excess
Explain a reaction in which A, B, and C react to form products is one-half order in A zero order in B and first order in C.
Problem- The solubility of sodium chloride in water is 35.9 g NaCl 100 g of water at 25 degree C. Calculate the mass percent and molality of NaCl in a saturated solution.
At 760 K, 15% of a sample of cyclopropane changes to propene in 6.8 min. What is the half-life of cyclopropane at 760 K?
Problem- The base dissociation constant for (CH3)3N is 6.31X10-5. What is the ph of a solution initially containing 5.250g (CH3)3N dissolved in 250.0 ml of solution when it reaches equilibrium
If 25 mL of 0.1 M HNO3 is added to a 0.01 L buffer solution that is 0.26 M HCNO and 0.13 NaCNO, what is the pH of the final solution? Ka for HCNO = 3.5x10^-4
The atomic masses of Li-6 and Li-7 are 6.0151amu and 7.0160amu respectively. Calculate the natural abundances of these 2 isotopes. The average atomic mass of Li is 6.941amu.
Calculate the approximate freezing point of a solution prepared by dissolving 10.0 g of naphthalene (C10H8) in 300. g of cyclohexane. Pure cyclohexane freezes at 6.6°C. Kf of cyclohexane = 20.0°C/m.
What are the major species present in 0.250 M solutions of each of the following acids. Calculate the pH of each of these solutions.
Mixing 40mL of a 4.00M sodium chloride solution NaCl with 20.0mL of a 2.50 M calcium chloride (CaCl2) solution results in a solution with a chloride ion concentration of
The heat of reaction for the conversion of natural gas, methane, to carbon dioxide and water is -802 kJ/mol. How many kJ are given off by the combustion of 0.150 mol of methane? The reaction is: CH4(g) + 2 O2(g)→ CO2(g) + 2H2O(g)
a 10.0l container of helium gas with a presure of 250mmhg at 0 degrees celsius is heated to give a pressure of
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