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Silicon has a FCC structure with unit cell edge of 5.43A and 4 atoms per init cell. a) how many silicon atoms are there in 1cm3 of material b) suppose you dope that 1 cm3 sample of silicon with 1ppm of phosphorus that will increase the conductivity by a factor of a million. how many milligrams of phosphorus is required?
If the mass of the metal cylinder pictured below is 18.71 g, calculate the density of the cylinder.
Calculate the mass of one oxygen atom and determine the number of oxygen atoms in a 10.00g sample of the element.
How do you tell whether a solution is basic, acidic or neutral just by looking at the formula? Like KCl. I need to know how to figure out whether it's neutral, basic or acidic and have no clue how this is done.
Compare the reactors when 1 reactor is a BSTR with V=10m^3 and the other is a CSTR with V=10m^3 &Q=10m^3/s. Assume Ca(t=0)=Ca0=10mol/m^3. a) Solve for Ca(t) and Xa(t) for the BSTR and the CSTR.
What is the sodium ion concentration in the final solution when 50.0 mL of 0.125 M NaCl is mixed with 50.0 mL of 0.200 M Na2SO4?
What is the vapor pressure of a aqueous solution containing 10 %(by weight) ethylene glycol (62 g/mol) at 25°C. PH2O = 24.3 torr at 25°C.
When a 18.5 g piece of copper originally at 99.5C is placed in 58.5 g of water at 24.0C, the temperature of the water rises to 26.1C. If the specific heat of water is 4.180 J , calculate the specific heat of copper. can you show work and the anser..
A concentration cell contains electrodes made of the same metal and solutions containing the same ions but a different concentrations. Consider Zn electrode in 0.1 M ZnSO4 solution in one compartment and Zn electrode in 1.0 M ZnSO4 for another com..
Assume that all of the atoms fit together next to each other like placing tennis balls in a cardboard box. The second layer directly on top of the lower layer.
for ammonia, Kb is 1.8*10^-5, to make a buffered solution with pH of 10.0, the ratio of [NH4+] to [NH3] must be
Calculate the 1/2 life for the decomposition of co2 which is first orderwithnrespect to co2 at 1000degree k with k=1.8x10to-13degree sec
The Kp for the reaction is 4.3X10^-4 at 648K. Determine the equilibrium partial pressure of NH3 in a reaction vessel that initially contained 0.900atm N2 and 0.500 atm H2 at 648K
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