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The method of concentrating the ore which makes use of the difference in density between ore and impurities is called
magnetic separation
If all of the electron groups around a single central atom are bonding, and the same outer atom is bonded to the central atom in each case, is the molecule polar, nonpolar, or does it depend on the identity
Which of the following has only a single peak in the proton NMR spectrum
Problem- Calculate the change in pH when 4.00mL of 0.100 M HCl(aq) is added to 100.0mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
The solubility of AgCl(s) in water at 25 degrees C is 1.33*10^-5 mol/L and its deltaH0 of solution is 65.7 kJ/mol.
Acid catalyzed hydration of 3-hexene gives only one alcohol with the molecular formula C6H14O. A) Draw the structure of 3-hexene.
Draw all of the eclipsed and staggered conformations for the c3-c4 bond in hexane starting with the conformation that has the lowest energy.
What is the mass, in grams, of 55.0 mL of the liquid propylene glycol, a moisturizing agent for foods, which has a density of 1.036 g/mL at 25 degress Celcius.
Silicon has been doped with 5 x 10^22 m^-3 of boron atoms. Calculate the conductivity of silicon at (a) room temperature (32 C) (b) at (125 C)
The combustion of ethane produces carbon dioxide and steam: 2C2H6 + 7O2 --- 4CO2 +6H20 How many moles of CO2 are produces when 5.55 mol of ethane are burned in an excess of oxygen.
If iron is oxidized to Fe2+ by a copper(II) sulfate solution, and 0.704 grams of iron and 12.6 mL of 0.581M copper(II) sulfate react to form as much product as possible,
A 50.0-mL volume of 0.15 M HBr is titrated with 0.25 M KOH . Calculate the pH after the addition of 20.0 mL of KOH.
Commercially available concentrated sulfuric acid is 18.0 M H2SO4. Calculate the volume of concentrated sulfuric acid required to prepare 2.80 L of 0.275 M H2SO4 solution.
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