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What volume (to the nearest 0.1 mL) of 6.00-M NaOH must be added to 0.650 L of 0.350-M HNO2 to prepare a pH = 3.30 buffer
A gas mixture composed of helium and argon has a density of 0.719g/l at a 743mmHg and 298k . What is composition of mixture by volume?
What was the molar solubility of CaCO3 in this solution (Kb1(CO32-) = 1.8 × 10-4)
Considering given equation as P4(s) + 5 O2(g) P4O10(s) where ΔH = -3013 kJ/mol you just need to compute the heat evolved when 436 grams of white Phosphorous (P4)burns in air according to the given equation as above.
what would be the chemical equation to this problem? In an investigation of the reaction between copper(II) ions, Cu2+, and hydrazine, N2H4, in alkaline conditions the following observations were made: 25 mL of a solution containing 25 g/L CuSO4.5..
A saturated solution of silver benzoate C6H5COOOAg has a pH of 8.5. The Ka for benzoic acid C6H5OOH, is 6.5x10-5 estimate the value of the Ksp for silver benzoate
We prepare a buffer by adding 0.4640 mol HNO3 to 0.5528 L of a solution containing 2.061 M trimethylamine [(CH3)3N, Kb = 6.500x10-5]. What is the pH of this buffer
what is the molar solubility of caf2 in 0.10 m naf solution at 25°c? the ksp for caf2 is 1.5 x 10^-10
Assume that a particular reaction evolves 241 {rm kJ} of heat and that 33 {rm kJ} of PV work is gained by the system.
there are two natuarlly occuring isotopes of rubidum. (85)Rb has a mass of84.9118 amu. (87)Rb has a mass of 86.9092 amu. Determine the abundance of each isotpe.
Calculate the concentrations of all species in a 1.73 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10-2 and Ka2 = 6.3× 10-8.
What is maximum light wavelength (nm) to be absorbed for creating electron-hole pairs in semiconducting material cadmium telluride (CdTe)? CdTe has a band gap of 1.44 eV.
the rate constant for the second order -reaction is NOBr(g)------>NO(g)+1/2Br2(g) is 48 L/mol*min at a certian temperture. How long will it take for 90.0% of a .0200M solution of NOBr to decompose
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