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A Pb-Sn alloy containing 40 wt% Sn is cooled from the liquid state to room temperature. How much of each phase is present in the material at room temperature. Sketch the expected microstructure.
Assume for the purposes of this problem that, to be an alcohol (-ol) or an amine (-amine), the hydroxyl or amino group must be bonded to a tetrahedral (sp3 hybridized) carbon atom. Write the structural formula of a compound with an unbranched chai..
Antimony has two naturally occurring isotopes, Sb-121 (mass = 120.9038 amu) and Sb-123 (mass = 122.9042 amu). Calculate the percent abundances of these isotopes of antimony
determine the empirical formula of a dead alkaline battery if ofund to contain a compound of Mn and O. Its analysis gives 69.6% Mn and 34.4% O
A solution of a dye in a 0.80 cm cuvette of concentration 1.25 x 10^-3 M had an absorbance of 0.115 at a particular wavelength. What was the molar absorptivity of the dye
Important information about Hydroboration reaction, In one experiment you combine 1-hexene which is reacted with H2SO4 with water as the solvent and the compound produced is 2-hexanol
What mass of iron is needed in order to supply the energy needed to warm 15.0mL of water (d= 1.00 g/cm3) from 23C to 37C
Write an equation for the formation of NH3g from its elements in its standard states.
What observed rotation is expected when a 1.50 M solution of (R)-2-butanol is mixed with an equal volume of a 0.750 M solution of racemic 2-butanol
Use the standard reduction potentials to find the equilibrium constant for each of the following reactions at 25°C.(a) Br2(l) + 2 I ?(aq) 2 Br?(aq) + I2(s)
The Ksp for calcium sulfate is 7.1 x 10^-5. What is the concentration of Ca^2+ in equilibrium with CaSO4(s) if [SO4^2-] = 2.0 x 10^-2 M
The three pKa values for phosphoric acid are 2.3, 7.2, and 12.1. Calculate the amount of each salt that you will need to prepare the buffer.
When the reaction A + B = C is at equilibrium, the concentrations of different chemicals is as follows: [A] = 2.00 mM, [B] = 3.00 mM, and [C] = 9.00 mM. What is the standard free energy change for the reaction
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