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a sample of helium is collected by displacing 182 mlk of water the pressure of the gas and the atmosphere are
a 1750 g sample containing potassium hydrogen carbonate is decomposed by heating if the mass loss is 271g what is the
what are the products of a toluene-sulfuric acid reaction and how may percent of
sulfuric acid h2so4 reacts with sodium chloride nacl to form aqueous sodium sulfate and hydrogen chloride gas what
show by explicit integration that a hydrogenic 1s and 2s orbitals b 2px and 2py orbitals are mutually
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explain why p-nitrophenol is a stronger acid than phenol itself would p-methoxyphenol be a stronger or weaker acid than
a complex ion mh2o62 is green in solution which of the following ligands when bound to the same metal might cause the
a complex ion ml62 is orange in solution if the same metal forms a complex with another ligand q that creates a
what is the structure for an h nmr of c7h9no giving signals of 693 093 h triplet 620 103 h doublet 613 101 h doublet
the 2-methylcyclhexanol used in experiments b and c is actually a mixture of two isomers what are they is it likely
explain how the methylcyclohexenes can be distilled from the reaction mixture if the distillation temperature is kept
give equations to show how sulfuric acid can convert 4-methycyclohexene into a mixture of four isomeric c7h12 compounds
a student used the ch3cooh solution prepare in question 2 to titrate 2500ml of 01246m of calcium hydroxide solution
the iron in 6656 gram ore sample was reduced quantitatively to the 2 oxidation state and then titrated with 26753g of
benzoyl peroxide the substance most widely used against acne has a half-life of 98 multiplied by 103 days when
exactly 100 ml of 015 m nitrous acid hno2 are titrated with a 015 m naoh solution calculate the ph for the
a 520 ml volume of 035 m ch3cooh ka18e-5 is titrated with 040 m naoh calculate the ph after the addition of 210 ml of
1 standard cell potential eo is measured at what conditions2 a using the nernst equation calculate the voltage for a
suppose you burn exactly 150g of benzoic acid c6h5co2h in a combustion calorimeter and find that the temperature of the
the following reaction is known as the thermite reaction it is very exothermic theiron produced in the reaction is a
how many grams of dry nh4cl need to be added to 240 l of a 0300 m solution of ammonia nh3 to prepare a buffer solution
1 why must the crucible containing cac2o4 and concentrated hno3 be heated in a fume hood2 describe the method for
the phase diagram of ammonia can be characterized by the following information the normal melting and boiling
what are the similarities between distillation and sublimation when would you choose one over the