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You want to know the detergent composition of an extract of a shampoo. You spot the sample on a TLC plate and develop it in dichloromethane and observe a single spot at Rf 0.95. Does this verify that only a single detergent compound is in the extract? What specifically can you do to gain more information about the composition of the shampoo extract?
Calculate the hydrogen-ion concentration [H+] for the aqueous solution in which [OH-] is 1 x 10-11 mol/L. Is this solution acididc, basic, or neutral? Show your work.
A is allowed to come in contact with substance B. B has a mass of 46.28 grams and its initial temperature is 86.5oC. These two substances reach thermal equilibrium at a temperature of 64.2oC. If the specific heat capacity of substance B is 1.17 J/..
What would the molar concentration of the tree sap have to be to achieve this pressure on a day when the temperature is 28?
A 18.0 L gas cylinder is filled with 6.00 moles of gas. The tank is stored at degrees celsius. What is the pressure in the tank
Assume that the heat capacity of water for the temperature rangere in the heat exchanger is constant at 7.54x10^-2 kJ/mol C) What is the temperature of water leaving the heat exchanger?
defined lead free paint as having less than 75mg of lead per 125mg of paint. How many parts per million of lead is this?
A quantity of N2 occupies 62.2 L at a particular temperature and pressure. Its density is 0.900 g/L. How many moles of N2 are in the container?
Explain carefully, with a drawing, why the protons substituted ortho to an acetyl group normally have a greater chemical shift than the other protons on the ring.
The equation for the complete combustion of acetylene, C2H2. You do not need to include any phase symbols or energy changes.
Table salt and sugar are accidentally mixed A 4.90 g sample is burned and 2.20-g of CO2 is produced What is the mass percentage of salt in the mixture?
If 100.0 mL of NO (at STP) reacts with 400.0 mL of O2 at STP, calculate the partial pressure of NO2 in the final reaction mixture.
Calculate the change in molar Gibbs free energy of tristearin when a deep-sea creature is brought to the surface (p = 1 atm) from a depth of 1.5 km. The density of sea water is 1.03 g/cm-3.
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