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Germanium forms a substitutional solid solution with silicon. Compute the weight percent of germanium that must be added to silicon to yield an alloy that contains 2.43 × 1021 Ge atoms per cubic centimeter. The densities of pure Ge and Si are 5.32 and 2.33 g/cm3, respectively. Also, the atomic weights for germanium and silicon are 72.64 and 28.09 g/mol, respectively.
A 2.00 x 10^-3 mole sample of actylsalicylic acid was dissolved in 15.00 ml of water and titrated with .100 M NaOH. The equivalence point was reached after 20.0ml of NaOH solution had been added.
A C^+5 ion in the n= 5 state moves to the n=7 state.Calculate the energy (E) change associated with this transition. Also, calculate the frequency, and wavelength of light which have this same energy and indicate whether light is emitted or absorb..
Write lewis structure for these species, including all resonance forms, and show formal charges: CH2NO2- The formal charge of N=1 and the formal charge of O=-2.
filtrate be used to transfer the residue when the desired product is solid
Hydrogen has two naturally occurring isotopes, 1H and 2H. Chlorine also has two naturally occurring isotopes, 35Cl and 37Cl. Thus, hydrogen chloride gas consists of four distinct types of molecules
Draw the structure of the product(s) of the reaction between (R)-3-methylhexan-2-one and phenylmagnesium bromide, followed by acidification. Use wedge and dash bonds to indicate stereochemistry. If more than one stereoisomer is formed, draw them a..
when carbon monoxide was burned with excess air at constant pressure and the measured temperature of exit gases
What is the name of the sticky gelatinous precipitate that is formed in the primary treatment process and carries away suspended dirt particles and bacteria?
The pressure inside a hydrogen-filled container was 2.10 at 21 . What would the pressure be if the container was heated to 90
What is this sum called. Explain the physics of this result. Show that the transform of an exponentially decreasing cosine wave is the convolution of a shifted delta function and a Lorentzian, that is, a Lorentzian at the frequency of the cosine w..
Hypohalic acid, HOX, is a weak acid with a Ka of 3.341x10-8. What is the pKb for the hypohalite anion, OX-, in a 0.8865 M solution of KOX
Explain how a calibration curve could be used to determine an unknown quantity
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