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Brass is a substitutional alloy consisting of a solution of copper and zinc. A particular sample of red brass consisting of 80.0%Cu and 20.0% Zn by mass has a density of 8780 k/m3.
a)What is the molality of in the solid solution? (mol/kg)
b)What is the molarity of in the solution?
Water is 11.2% hydrogen and 88.8% oxygen by weight. If 75.5 grams of hydrogen are produced by decomposing water, how many grams of water were decomposed and how many grams of oxygen were produced
A compund with a formula mass of 42.08 amu is found to be 85.64% carbon and 14.36% hydrogen by mass. find its molecular formula. I did this problem and got c2h for the epirical formula then for the molecular formula i got c4h2 but im not sure that..
A reaction at 25C is known to standard changes in free energy, enthalpy and entropy of -38.4 kJ/mol.96.3kJ/mol
Method for Trapping a Gas, The decomposition of 3-sulfolene to form 1,3-butadiene generates 1 mole of sulfur dioxide gas per mole of 1,3-butadiene. Substantial quantities of SO2 would be generated if this decomposition were carried out on a large ..
What kind of hybrid orbitals are found on the central atom in ICl3. Answer a. dsp3 b. sp2 c. sp3 d. sp4 e. sp3d2
a sample of helium gas initially at 37 degrees celsius, 785 torr and 2.00L was heated to 58.0 degrees celcius while the volume expanded to 3.24L. What is the final pressure in atm.
When considering the Ideal Gas equation of state, the molecules in the gas are assumed to have no interaction with each other at all. In real gases, however, attractive intermolecular forces exist between the molecules in the gas
Describe a sequence of reactions by which hept-1-yne can be prepared from hept-1-ene. Provide a Chemical equation as well.
The molar absorptivity coefficients for dye A are 4,875 at 628nm and 2,518 at 684 and for dye B are 1,578 at 628nm and 11,543 at 684nm. In an unknown mixture of the two dyes, the absorbance at 628nm is 0.7619 and the absorbance at 684nm is 0.6917...
How many pounds of coal (of heating value of 10,000 BTUs per pound) would be needed to provide the 100 quadrillion BTUs if the efficiency of conversion to electricity was 35%? What fraction of the US coal reserves (estimated at 250 billion short t..
How much gold metal (in grams) can be electro-plated from a gold (III) solution with 1.50 V and 2200 mAh. I think it is 16.17 grams
Calculate the cell potential for the following reaction as written at 59 °C, given that [Zn2 ] = 0.874 M and [Sn2 ] = 0.0170 M. Standard reduction potentials can be found here.
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