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A 0.60040 g sample of Ni/Cu condenser tubing was dissolved in acid and diluted to 100.0 mL in a volumetric flask. Titration of both cations in a 25.00 mL aliquot of this solution required 45.81 mL of 0.05285 M EDTA. Mercaptoacetic acid and NH3 were introduced, production of the complex with the former resulted in the release of an equivalent amount of EDTA, which required a 22.85-mL titration with 0.07238 M Mg2+. Calculate the percent Cu and Ni in the alloy.
A helium-filled weather balloon has a volume of 2.4 × 102 L at 99 kPa pressure and a temperature of 0°C. What is the mass of the helium in the balloon?
If a 1.22 g piece of gold is hammered into a sheet whose area is 32.4 ft2, what is the average thickness of the sheet? (The density of gold is 19.32 g cm-3.)
Lithium hydrogen carbonate decomposes by heat; the reaction is represented by the balanced equation: 2LiHCO3 (s) --------> Li2CO3(s) + CO2(g) + H20 (g)
You have 75.0 mL of a 2.50 M solution of Na2CrO4(aq). You also have 125 mL of a 1.52 M solution of AgNO3(aq). Calculate the concentration of CrO4 2- after the two solutions are mixed together.
Nitrogen dioxide and water react to produce nitric acid HNO3 and nitrogen monoxide.
How many milliliters of 1.50 M H2SO4 are needed to neutralize 50.0 g of NaOH?
What is the theoretical yield of hydrazine, in grams, prepared from the reaction of 150.0mL of 1.01 M NH3 (aq) with 50.0 mL of 1.25 M NaOCl (aq)?
what is the change in pH after addition of 10.0mL of 1.0M sodium hydroxide to 90.0mL oof a 1.0M NH3/1.0M NH4+ buffer? (Kb for ammonia is 1.8 X 10-5)
Suppose a reaction has a standard Gibbs-free energy of 2.90 kJ/mol, calculate the relative ratio of product to reactant.
Give a physical explanation of why the intrinsic viscosity and the specific viscosity divided by the concentration need
Suppose that, from measurements in a microscope, you determine that a certain bacterium covers an area of 1.50 μm2
Suppose 110. mmol of electrons must be transported from one side of an electrochemical cell to another in minutes. Calculate the size of electric current that must flow.
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