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What is the pH of a solution made by dissolving 0.052 grams of RbOH in enough water to make 64.9 mL of solution?
What is the maximum kinetic energy of an ejected electron if platinum metal is irradiated with 174-nm light? The threshold wavelength for a platinum metal surface is 212 nm.
Draw the structures of 1-phenyl ethanamine and tartaric acid. Calculate how much of each compound would be needed to create
What are the origins of these signals? Why does the spectrum contain two other signals of roughly equal height? What are the origins of these signals
A 1.25g sample of ore containing iron pyrite (FeS2) was pulverized and ignited in air, converting the Fe2O3 and SO2. The Fe2O3 produced weighed 0.516g.
a student used a pH probe that was not properly calibrated. the probe reads the pH one unit higher than it should be. what would the calculated Ka value of the unknown acid
What feature of atomic emission spectra is incorporated in the schrodinger model of the hydrogen atom
Chemicals available for extractions: CH2CL2, 1M NaOH, 1M HCL and sodium sulfate for drying, Chemicals available for crystallization: ethyl ether, 95% ethanol, methanol, isopropyl alcohol, acetone, hexane, toluene and methylene chloride.
values for an equlibruim constant suggests that at equilibrium the mixture contains a high concentration of products?
Its volume in the liquid state is 1.00 cm3 and its volume in the vapour state is 1671 cm3. Find the work done by expansion due to evaporation and the change of internal energy of the system.
Determine the vapor pressure lowering at 27C of a solution of 75g of sucrose dissolved in 180 g of water. Vapor pressure of pure water at 27C is 26.7 torr
A gas under a pressure of 74 mmHg and at a temperature of 75C occupies a 500.0-L container. How many moles of gas are in the container?
Why is it important to use a large excess of sodium borohydride when doing a reduction in aqueous ethanol. Consider what reaction might occur between water and sodium borohydride.
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