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For an alloy that consists of 28.9 wt% Pb and 71.1 wt% Sn, what is the composition (a) of Pb (in atom percent), and (b) of Sn (in atom percent)? The atomic weights for Pb and Sn are 207.2 and 118.69 g/mol, respectively.
Using a band diagram, explain how magnesium can exhibit metallic behavior when its 3s band is completely full.
Consider the following reactions and select the false statement below. CO2(g) + OH?(aq) ? HCO3?(aq) Cr3+(aq) + 6H2O(l) ? Cr(H2O)63+(aq) A. a lone pair of electrons on the OH?
Calculate the mass of nitrogen dissolved at room temperature in an 83.0 {rm L} home aquarium. Assume a total pressure of 1.0 {rm atm} and a mole fraction for nitrogen of 0.78.
Why is the meso-Stilbene dibromide much less soluble in all solvents than the dl-isomer from the bromination of cis-stilbene
Determine the number of moles in isooctane required to produce 2.550kj of heat in the reaction below:
The Solubility of calcium arsenate, Ca3(AsO4)2 is 3.63 milligrams per 100mL. What would you expect the solubility product (Ksp) to be
what is the molar mas of gas if 1.20g of the gas has a volume of 235 mL at STP? A 1.26 sample of He gas has a pressure of .123 atm and volume of 32.6 L. what is the temperature in degrees C?
Calculate the mole fraction of toluene in the solution that contains 48.0 g toluene and 139 g benzene.
If a solution containing 54.368 mercury(II) perchlorate is allowed to react completely with a solution containing 15.488 g of sodium sulfate, how many grams of solid precipitate will be formed?
A sheet of aluminum foil has a total mass of 1.000ft2 and a mass of 3.745g. What is the thickness of the foil in millimeters. (Density of Al = 2.699 g/cm3.)
near the triple point t273.15k the vapor pressure of ice is given by lnp -5924t 2.72lnt-0.0072t 9.912 where p and t
A student carefully diluted 50.0mL of 6 M HCI solution in 950.0 mL of distilled water. Calculate the molarity of the diluted acid solution. Explain why this diluted HCI solution cannot be used as a standard solution of acid.
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