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Gallium arsenide is a common semiconductor. This material becomes a conductor when irradiated with infrared light whose frequency is 3.43 × 1014 s-1. Calculate the band gap of GaAs in kJ/mol.
Explain how this system appears static but in fact is a dynamic equlibrium, Na+(aq) + Cl-(aq) --> NaCl(s), that is in constant motion though the mass of solid is constant.
Which atom has the largest partial positive charge in these bonds. C-H, C-O, C-F, C-Cl C in C-O Cl in C-Cl O in C-O F in C-H C in C-H C in C-Cl C in C-F
If the 53 g aluminum block is initially at 25^circ C, what is the final temperature of the block after the evaporation of the 1.02 galcohol? Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and t..
What volume of NaOH is needed to reach the end point of the titration? What was the initial concentration of HCl?
The voltage across the leads of a glass pH-reference combination electrode immersed in a solution of pH 8.00 was 133 mV. Calculate the expected voltage if the pH of the solution is raised to 9.00
Write as a superposition of 3 eigenstates, indicating the numerical value of each coefficient. Using the coefficients, demonstrate that is normalized.
Draw a Lewis structure for H3C-NO2. Both oxygen atoms are directly attached to the nitrogen atom. If you take formal charge considerations into account, how many -bonds are in the molecule?
Identify an alkane with the molecular formula c5h12 that forms only one monochlorinated product when heated with Cl2
When a 0.6333-g sample of a compound of carbon, hydrogen and sulfur was burned in excess oxygen, 0.9272 g CO2, 0.3795 g H2O and 0.6749 g SO2 were obtained. In a separate experiment, it was found that, for fixed temperature and pressure
How many moles of calcium oxalate are present in the kidney stone? If this kidney stone is entirely calcium oxalate, what is the mass of the stone
A compound is 54.53% C, 9.15% H, and 36.32% O by mass. What is its empirical formula
When a 1.30-g sample of ethanol (alcohol) is burned in a calorimeter, the heat released increases the temperature of 870g of water in the calorimeter from 18.5 C to 28.9 C .
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