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Question: 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 8750 kg/m3.
(a) What is the molality of Zn in the solid solution?
(b) What is the molarity of Zn in the solution?
Predict whether the entropy change for each of the following reactions will have a positive value or a negative value.
A photoelectron produced by ionization in a photoelectron spectrometer is ejected with a velocity of 861 km s-1. Calculate the de Broglie wavelength (in Ã) of the electron.
The concentration of iodine in sea water is 60 parts per billion by mass. If one presume that the iodine exists in the form of iodide anions, define what is the molarity of iodide in sea water. The density of sea water is 1.025 g/mL
How many moles of H3O+ must be added to one liter of a solution to adjust the pH from 8.54 to 5.58? Use E notation and 3 significant figures.
3.5 g of a hydrocarbon fuel is burned in a vessel that contains 250. grams of water initially at 25.00 C. After the combustion, the temperature of the water is 26.55 C.
Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [N2]eq = 3.6 M, [O2]eq = 4.1 M, [N2O]eq = 3.3 × 10-18 M.
Calculate the amount of heat (in kJ) required to raise the temperature of 242 grams of water from 24 degree C to 65 degree C.
A strip of electrolytically pure copper weighing 3.178 gram is strongly heated in a stream of oxygen until it is all converted to a black oxide. The resultant black powder weighs 3.978 g. What is the formula of the oxide?
Hydrogen atoms that are bonded to an sp3 hybridized carbon atom normally appear between 0.9 - 1.8 ppm and are said to be shielded. What would cause the hydrogen atoms bonded to an sp3 hybridized carbon atom to be deshielded and appear downfield
draw a lewis diagram for ch3och2ch3. use your diagram to answer the following questions. best ans 10 points?the number
Question- "When there is too much of the amino acid, isoleucine, it gets catabolized. Draw out the detailed reaction pathway of isoleucine catabolism from isoleucine to acetyl-CoA and propionyl-CoA.
describe an experiment that you could perform in lab that would provide the data so you could calculate the Ka value for sulfamic acid, HSO3NH2.
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