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Why is it better to do three extractions with say 10mLs of each rather than one large extraction with 30 mLs of solvent?
1.50 grams of HNO3 is added to water to obtain a final volume of 700.0 ML. What is the final concentration of H+?
1.50 grams of HNO2 is added to water to obtain a final volume of 700.0 mL. What is the equilibrium concentration of H+? ka for HNO2= 4.6 x 10^-4 .
osmium os is the densest element known density 22.57 cm3 calculate the mass in grams of a cylinder of osmium with a height of 3.0cm and a diameter of 1.0cm?
Among alkyl halides,order of reactivity of SN2 reaction is
Discuss the factors which are mainly responsible for this order.
Predict the product of reduction of pyrrole with with zinc and ethanoic acid
Draw all of the stereoisomers of 2,3-butandiol, label meso compounds and pairs of
Why suitable reducing agents are required for reduction of metal oxides? What are the
guidelines to choose a particular reducing agent?
In which cases is hydrometallurgy applicable? In such cases, how are the leached out
metals recovered from solution? Explain with suitable examples.
Why do you think it is easy to convert between FeO, Fe3O4 and γ-Fe2O3 through the
application of heat?
It is quite remarkable that in 430 BC, Democritus of ancient Greece proclaimed that the atom was the simplest unit of matter, and that all matter was composed of atoms. If only he'd had a scanning tunneling electron microscope (STEM), capable of imaging individual atoms! Modern chemists are focused on all aspects of chemical reactions for the development of new drugs, materials, consumer products, industrial processes, agricultural chemicals and more.
In many colleges and universities, students may be required to complete a general chemistry course. A basic course in general chemistry will involve the following topics:
- Basic concepts
- Atoms and atomic masses
- Electronic configuration
- Chemical bonding
- Formula calculations
- Chemical reactions
- Net ionic equations
- Solids and liquids
- Oxidation numbers
- Kinetics and equilibrium
- Acids and bases
- Organic chemistry
- Nuclear reactions
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A variety of helpful resources are available for students who feel they need to expand their general chemistry knowledge base or could use a chemistry refresher course. Students should be following the International Journal of Chemistry to keep up to date in this area. The University of Arizona has a chemistry tutorial. And finally, one can find a list of "top ten" books on general chemistry at Amazon.com.
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