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an aqueous solution made by dissolving 168 mg of an unknown compound a nonelectrolyte in enough water to make 5000 ml
in biochemistry laboratories solutions of sucrose table sugar c12h22o11 are used in high speed centrifuges to separate
how many grams of solid aluminum sulfide can be prepared by the reaction of 110 g of aluminum and 164 g of sulfur and
you come down with a case of indigestion this condition is caused by over excretion of hydrochloric acid in the
while browsing around the lab one day you find a white solid in a dusty bottle with a faded label upon closer
a 45-g piece of ice at 0 degree c is added to a sample of water at 8 degrees c all of the ice melts and the temperature
to investigate how the change in concentration of a copper sulfate solution changes the voltage of the
1 based on what you know about vibrational frequencies would you expect cyclohexanecarbaldehyde or benzaldehyde to have
a compound of iodine and cesium contains 6260 g of metal and 6090 g of nonmetal how many grams of cesium are in 3494 g
fluorite a mineral of calcium is a compound of the metal with fluorine analysis shows that a 226 g sample of fluorite
consider two reactions reaction 1 has a constant half-life whereas reaction 2 has a half-life that gets longer as the
explain why the boiling point of a two component mixture rises slowly throughout a simple distillation when the
the concentration of a chemical degrades in water according to first-order kineticsthe degradation constant 02 day-1if
how many grams of nacl would you need to add to a a 1 l water sample ph7 so the ionic strength equaled
obtain an expression in terms of g giving the number of grams of h20 that can be formed by the combustion of g grams of
a 500 kg mixture of salt and water is 150 by mass salt give the mass of salt and water in the
an unknown metal m reacts with sulfur to form a compound with the formula m2s if 1233 g of m reacts with 311 g of s
calculate the by mass and the molarity of a mgcl lower subscript 2 solution made by dissolving 108 g mgcl lower
a dry-cleaning solvent molecular weight 14699 gmol that contains c h and cl is suspected to be a cancer-causing agent
suppose a runner completes a 10k road race in 42 minutes and 21 seconds what is the runners speed in miles per
when a sample of dna forms a double helix the measured deltag is -17 kcalmol at ph 70 1 m nacl and 37 degrees c if the
the pka of one of the hydrogens that is attached to one of the nitrogens of the purine guanine is 97 if guanine is in a
a reaction is performed in a vessel attached to a closed-tube manometer before the reaction the levels of mercury in
a 500g mixture of copper i oxide and copper ii oxide contains 425g cu by mass what is the mass of cuo in this