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determine the quantity g of pure cacl2nbspin 75 g of cacl2bull9h2o75g cacl2 9h2onbsp 1molecacl2 9h2o 27312 grams nbsp
an effusion cell has a circular hole of diameter 300 mm if the molar mass of the solid in the cell is 300 g mol-1 and
use the maxwell distribution of speeds to estimate a the fraction of co2 molecules at 300 k that have speeds in the
q1 during the coupling reaction why does the coupling occur in the 1-position for 2-naphthol hint write the resonance
what is the percent by mass of carbon found in caffeine c8h9n4o2 what is the mass of carbon in milligrams found in 95mg
a 3500-ml solution of 02500nbspmnbsphf is titrated with a standardized 01453nbspmnbspsolution of naoh at 25degca what
find the ph during the titration of 2000 ml of 01000nbspmnbsptriethylamine ch3ch23nnbspkbnbsp 52nbsptimesnbsp10-4
a 100-ml reaction vessel initially contains 260 times 10-2nbspmoles of no and 130 times 10-2nbspmoles of h2 at
explain how you could experimentally determine whether the outside temperature is higher or lower than 0 degc 32 degf
give the number of protons electrons and neutrons in neutral atoms of each of the following isotopes a 3 7li b 52 125te
an important industrial process for synthesizing the ammonia used in agricultural fertilizers involves the combination
what is the value of the equilibrium constant kcnbspfor the following reaction at the temperature of the
a reaction vessel contains an equilibrium mixture of so2 o2 and so3 the reaction proceeds such that2so2nbspg o2nbspg
if you add 04397 g of benzoic acid to a 100 ml volumetric flask and then add enough water to bring the total volume to
1 what is the wavelength of light in nm if the frequency is 42 x 1014 1sec2 what is the wavelength of light in
copper sulfide is oxidized by molecular oxygen to produce gaseous sulfur trioxide and solid copper ii oxide the gaseous
the water-gas shift reaction is an important source of hydrogen the value of kcnbspfor the reaction below isnbspis 51
potassium chloride has solubility 430 g 100 g water at 50ocnbspwill a mixture of potassium chloride 1100 g and water
to determine deltahfusionnbspof water you will essentially add ice to water allow the ice to melt and note the
the fluorides bf3 alf3 sif4 and pf5nbspare lewis acidsnbspthe all form very stable fluoroanions when treated with
the black tarnish that forms on pure silver is the sulfide ag2s formed by reaction with h2s in the atmosphere4 ag 2
write the balanced equation for the decomposition of nahco3 this time with the term energy on the appropriate side of
you had to heat the nahco3nbspstrongly in order for you to see it to decomposenbspthis is an example of
1 what is the potential energy and the associated hamiltonian for the h-atom draw the potential energy vr2 show that
consider a buffer made of 1 m hydrofluoric acid and 1 m potassium fluoride with a volume of 450ml 5 mmol of sodium