balance equation and tell what type reaction occurred
methan and oxygen are heated to yield?
The professor wants that we do the following, Starting from alcohol that contains four or less carbons atoms and from benzene and toluene outline how the following can be synthesize: a) 2,3-dimethyl-2-butanol b)2-bromo-2methyl hexane c) 1,2-diphenyl-2-propanol d) 1-parabromophenyl-1phenal-1propanol
The professor wants that we do the following: Outline all steps in the possible synthesis of each of the following compounds from benzene and / or toluene, using any necessary aliphatic or inorganic reagents. Assume a pure para isomer that can be separated from an ortho/para mixture a) ethylbenzene b) phenyacetylene c) iso ...continues
Molecular weight and solution problem
the molecular weight of NaOH is 40. the molecular weight of a widely used buffer, HEPES, is 255. HEPES has a pK of 7.5 and is available in the acid form. how many grams og HEPES and NaOH are needed to produce one liter of a 0.5 molar solution of pH 7.5? of pH 7.0? of pH 8.5?
What ratio of K2HPO4 to KH2PO4 is needed to obtain a solution of pH 7.00?
The dissociation of the second hydrogen of a phosphoric acid has a pK of 7.21. What ratio of K2HPO4 to KH2PO4 is needed to obtain a solution of pH 7.00?
A widely used buffer is known as Tris, which has a molecular weight of 121, and a pK of 8.1.Tris is a base which is ordinarily neutralized with HCl. during the course of the reaction you are studying, it is anticipated that 0.01 moles per liter of H+ will be produced. When the pH of the reaction drops 0.3 units below its opt ...continues
Reduction through constant current electrolysis
Reduction through constant current electrolysis a) How much Cr3+ was reduced to Cr2+? b) A few seconds after the electrolysis was stopped, the potential of the cell came to rest at -0.524 volts. How much Cr3+ actually remains in the solution? c) What was the original Cr3+ concentration?
An aromatic compound, RX, fluoresces at 470 nm (quantum yield = 0.1) after excitation at 340 nm. The molar absorptivity of RX at 340 nm is 1100. How much energy has been lost by non-radiative means or remains with the compound after it fluoresces at 470 nm? How many joules of energy per mole of 340 nm photons is retained by a 10 ...continues
Please, I would like you to derive the fractional compositions for a monoprotic and diprotic systems shwowing the steps as clear as possible including a brief description of a fraction compostion plot. And if possible throw in examples, so I can understand it better.
One significant figure and one conversion problem
1) How many significant figures are there in the answer to the following problem? (8.881*.02100) + .590? 2) A parsec is 206,265 times the distance from earth to the sun. If the distance is 8.000 million miles, express the distance of a parsec in miles in scientific notation.
