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Question- What is the van't hoff factor of a compound that has a osmotic pressure of 2056 torr at 25 degrees C and a concentration of 0.1522M?
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Question- How long will it take to produce 78.0 g of Al metal by the reduction of Al3+ ions in an electrolytic cell with a current of 2.00 amperes? ( Al: 26.98 g/mol)
you have a buffer system made up of equimolar amount of carbonic acid,H2CO3, and sodium bicarbonate,NaHCO3. Write equations to show how this buffer behaves when (a) HCL is added and (b) NaOH is added.
What volume, in liters, of hydrogen gas measured at STP can be produced from 50mL of 6.0 M hydrpbromic acid and ac excess of zinc metal, according to the following reaction: 2HBr(aq)+Zn(s) -> ZnBr2 (aq)+H2(g)
You need to make 500 ml of 100 mM potassium phosphate buffer at pH 7.5. You have the stock solutions of KH2PO4 and K2HPO4 at 1M each. You will make the buffer by adding some of each of these stock solutions to water.
Problem- An aqueous solution containing 5.35 g of an optically pure compound was diluted to 700.0mL with water and placed in a polarimeter tube 10.0 cm long. The measured rotation was -5.15° at 25 °C.
How many lone pairs of electrons are there in a molecule of crotononitrile?
Problem- Calculate the standard free energy of the following reactions at 25 C using standard free energies of formation
CH3CH2CH2CN can be synthesized by an SN2 reaction. Draw the structures of the alkyl chloride and nucleophile that will give this compound in highest yield.
What volume of 2.0 M NaClO must be diluted with water to prepare 500.0 mL of 0.10 M NaClO?
How many grams of the strong acid HClO4 must be combined with water to make 400 ml of a solution with a pH of 1.5.
During an experiment, a student adds 1.05 g of calcium metal to 200.0 mL of 0.75 M HCl. The student observes a temperature increase of 17.0 °C for the solution
The first ionization energy of magnesium is greater than the first ionization energy of calcium. Explain. The first ionization energy of nitrogen is lower than the first ionization energy of oxygen. Explain.
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