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A copper refinery produces a copper ingot weighing 150lb. If the copper is drawn into wire whose diameter is 7.50mm, how many feet of copper can be obtained from the ingot?
A sample of carbonic acid (0.125 L, 0.165 M, pKa1 = 6.35, pKa2 = 10.33) was titrated with 1.53 M NaOH. Calculate the pH at the following points: Before the titration. At the 1st midpoint. At the 1st stoichiometric point.
A solution is initially 2.5 x 10-3 M in Cu+ and 2.5 x 10-3 in Pb 2+. Iodine ion is gradually added to the solution. Determine the concentrations of Cu+, Pb +2, and I- at the point of maximum separation. The solubility products of CuI and PbI2 are ..
In a 0.10 M solution of a weak diprotic acid H2A the species present in highest concentration (besides water) would be
What is the molecular weight of a gas if a 21.0 g sample has a pressure of 836mmhg at 25.0 degrees c in a 2.00L flask
a certain first-order reaction has a rate constant of 8.80times10-3. how long will it take for the reactant
The physical phenomenon that governs the shape of the Temperature/Reaction Completion Time curve is
Na3PO4 + 3AgNO3 = Ag3PO4 + 3NaNO3 How many moles of AgNO3 would be required to react with 2.0 mol of Na3PO4.
If the density of sulfuric acid is 1.05 g/ml in the original 1 L solution, then find the weight percent of sulfuric acid in solution.
Calculate the maximum amount of thorium ion that could be present in a waste water, if it is made 0.1500 M in oxalate ion. Assume the oxalate is present in stoichiometric amount, compared to the thorium.
Calculate the pH of 0.300 L of a 0.500 M NaHSO3 / 0.300 M Na2SO3 buffer before and after the addition of the following solutions. Assume that the volume remains constant.
One of the emission spectral lines for Be3+ has a wavelength of 253.4 nm for an electronic transmission that begins in the state with n = 5.
What is the internal energy (U) change of a system that emits 358 J of heat and receives 412 J of work
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