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Sodium chlorate (NaClO3(s)) dissociates, during moderate heating to produce solid sodium chloride (NaCl(s)) and gaseous oxygen (O2 (g)). A 3.4671 g of impure sodium chlorate was heated until the evolution of oxygen stopped. The mass of sample residue was subsequently found to be 2.9073 g. What wt% of the original impure sample was really sodium chlorate? Assume that no gases will be evolved from the impurities.
how many moles of methane occupy a volume of 2.00 L at 50.0 degress C and 0.500 atm? (R=0.0821atm x L/mol x K)
The diameter of Earth at the equator is 7926.381 mi. Round this number to three significant figures, and express it in standard exponential notation.
What is the retention factor for the following TLC plate if the baseline is 1 cm, elution solvent traveled 5 cm from the bottom of the plate, and the spot of interest traveled 3.5cm
an experiment requires 44.0 g of ethylene glycol a liquid whose density is 1.114 gml. rather than weigh the sample on a
a couple of drops of water were accidentally placed on the properly folded filter paper before its mass was measured.
What is the composition of this mixture on a mole percent basis? Show all calculations and report answer to correct number of significant figures
if the benzophenone used to prepare triphenylmethanolfrom a reaction of benzophenone and phenylmagnesium bromide is wet
A solution containing 3.45 mM of p-xylene (analyte) and 6.86 mM of nonane (standard) gave peak areas of 13587 and 14769 respectively, in a chromatographic analysis. then 1.5 mL of 6.86mM nonane solution was added to 5 mL of an unknown sample conta..
What is the molarity of a nitric acid solution if 43.53 mL 0.1000 M KOH solution is needed to neutralize 20.00 mL of the acid solution
Calculate the equilibrium constant Kc
how has discrimination affected economic efficiency and wages? you are asked to tell us what effect discrimination you
what is the aluminum ion, Al3+, concentration if the cell potential is 0.447 V and the manganese (II) ion concentration is 0.10 M?
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