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Silicon has a face centered cubic crystal structure with unit cell edge length of 5.43 A and four atoms per unit cell A) How many silicon atoms are there in 1 cm3 of material? B) Suppose you dope that 1cm3 sample of silicon with 1ppm of phosphorus that will increase the conductivity by a factor of a million. How many milligrams of phosphorus are required?
An oxygen tank contains oxygen at a pressure of 70 kPa. When the pressure drops to 36 kPa, the temperature increases from 300 K to 350 K. If the initial volume is 9 L, what is the final volume?
Ethyl alcohol is produced by the fermentation of glucose, C6H12O6. Given that the enthalpy of formation is -277.7 kJ/mol for C2H5OH(l) and -393.5 kJ/mol for CO2(g)
Rank the following elements by electron affinity, from most positive to most negative EA value. Tellurium, Bromine, Arsenic, Sodium and Neon
If a 1.00g sample of a carbon-containing compound is burned in air, 0.75g of CO2(the only carbon-containing product) is produced. What is the mass carbon in the compound
If 7.1 g of butanoic acid, C4H8O2, is dissolved in enough water to make 1.0 L of solution, what is the resulting pH? A table with Ka values can be found here.
A standard Ni(s) |Ni^2+ (aq) || Ag^+ (aq) | Ag(s) is constructed and the standard potential is 1.03 V a) write a balanced reaction for the cell
How many mL of a 2.0 M solution of NaOH would bve needed in order to have 0.500 mol of NaOH? (Molar mass of NaOH is 40.0 g/mol)
we know that actually it is filled with a mixture of gases called air. If the flask volume is 4.00 L, and the air is at standard temperature and pressure, how many gaseous molecules does the flask contain?
What percentage of a serving of this sandwich did Michael burn during his winning time of 1 minute 54 seconds in the 200-meter individual medley relay race?
When pressure is applied to a liquid, its volume decreases. Assuming that the isothermal compressibility
ozonolysis of a followed by dimethyl sulfide reduction produces a single optically active compound c c5h8o2. reduction
If the liquid effluent from the press could be fed to the spray dryer without afffecting the tasteof the product, by what percentage would the production rate of instant coffee be increased
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