Draw a rough energy band
In what type of material is the energy gap between the valence and the conduction band the greatest? Na, Ge or diamond. Draw a rough energy band showing the valence and conduction bands in these materials.
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Predict the product(s) and write a balanced equation for the following redox reaction: (include state os matter) pentane(C5H12) + oxygen >
Calculate the volume of oxygen gas at stp produced when 3.57 grams of h2O2 decomposes to produce water and oxygen
Part A: Thymolphthalein is an indicator that changes color over a range from pH = 9.3 to pH = 10.5 . What is Ka of thymolphthalein. Part B: Alizarin yellow R, Ka=7.9x10^-12, is yellow in its protonated form (HX) and red in its ionized form (X-)
Calculate the freezing point of a solution made from 22.0 g of octane (C8H18) dissolved in 148.0.g of benzene. Benzene freezes at 5.50 oC and its Kf value is 5.12 oC/m
Calculate the mass/volume percent of a NaCl solution in which 186 g of NaCl is dissolved in enough water to give a total volume of 1.67 L
A gas sample has a voulume of 4250 ml at 15 degree celcius and 745mmHg. What is the new container with a voulume of 2.50 L and a pressure of 1.20 atm
What volume of CO2 gas is produced by the complete combustion of 2.6L (C3H8) gas? Assume all gas volumes are measured at the same temperature and pressure.
What is the buffer capacity of the resulting solution? (The buffer capacity is the number of moles of NaOH that must be added to 1.0 L of solution to raise the pH by one unit.)
Consider a single photon with a wavelength of a frequency of and an energy of E. What is the wavelength, frequency, and energy of a pulse of light containing 100 of these photons
Write the structural formulas for the products that form when 1-butene reacts with each of the following reagents: a) HI b) H2, Pt c) Dilute H2SO4, warm d) Cold concentrated H2SO4
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