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A crystal consists of a building block (an atom or group of atoms) that is repeated periodically through space.(a) Describe the difference between the "crystal lattice", the arrangement of lattice points in space, and the "crystal structure", the arrangement of atoms in space.(b) Explain how every crystal lattice has a unit cell that has the shape of aparallelopiped and is "primitive" in the sense that it contains only one lattice point.(c) Given (b), why do we often choose a unit cell that contains more than one lattice point (for example, the face-centered cubic and body-centered cubic cells)?
if 28ml of 6.2 m sulphuric acid was spilled determine what is the minimum mass of sodium bicarbonate or sodium hydrogen
The pH of a bicarbonate-carbonic acid buffer is 8.30. Calculate the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-).
Calculate the molar mass of the uknown compound. The boiling point elevation constant for water is0.52°C/m
What is the half-life in minutes of a compound if 75.0 percent of a given sample decomposes in 85.0 minutes? Assume first order kinetics
Calculate the amount of heat energy (q) gained or lost when 180g of water is cooled from 65.0*C to 28.5*C. What is the sign of q for this calculation
The solubility of lanthanum iodate at a certain temperature is 9.55 x 10^-4. What is the Ksp of this compound at that temperature
Draw a structural formula of the R configuration of the compound shown below. Illustrate the stereochemistry about the chiral carbon using the "single up" (solid wedge) and "single down" (hashed-line wedge) bond tools. Show explicitly the bonds to..
The complex formed between Cu(I) and 1,10 phenanthroline has a molar absorptivity of 7000 L cm-1 mol-1 at 435 nm, the wavelength of maximum absorption.
At a certain temperature, the equilibrium constant, Kc, for this reaction is 53.3. H2(g)+I2(g) 2HI(g) Kc=53.3 At this temperature, 0.800 mol of H2 and 0.800 mol of I2 were placed in a 1.00-L container to react. What concentration of HI is present ..
dissolved in 200 mL of solution. What is the pH of the solution? pKa1 = 6.37 and pKa2 = 10.25.
How much heat is needed to vaporize 2.42 g of liquid oxygen if the molar heat of vaporization for oxygen is 1,629 cal/mole?
The carbon-14 activity of some ancient Native American corn was found to be 7.0 disintegrations per minute (dpm) per gram of carbon. If present-day plant life has 16 dpm per gram of carbon
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