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what mass of nah2po4 must be added to 120 l of 020 m na2hpo4to make a buffer solution whose ph690
why does the temperature of a solution increase if the reaction is exothermic for example in the precipitation of
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consider a string with a length of 545 cm tied at both end like on a stringed instrument if the frequency of the first
consider a pipe with a length of 435 cm if the temperature of the air is 195 oc and the pipe is closed in one end and
if you take a 100 ml portion of a 148 m ammonia solution and dilute it to a total volume of 0250 l what is the
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titanium reacts with hydrogen peroxide in 100 m sulfuric acid to form a colored complex if a 200x10-5 m solution
please create 1 synthesis you get to choose any starting material but you should demonstrate all of the following
determine the percent yield of barium sulfate obtained 49852g when 1000 ml of a 02516m aqueous barium chloride is
calculate the molality of a solution prepared by dissolving 475g of c10h8 in 750 ml of c6h6 l of density
1 when h2 gas was released by the reaction of hcl with zn the volume of h2 collected was 660 ml at 26 c and 750 mmhg a
1 perchloric acid is either a broslashnsted-lowry acid or a broslashnsted-lowry base if it is an acid what is its
a sample of o2 was collected over water at 25c and 865 atm if the total sample volume was 2538 l how many moles of o2
a 1000l tank at 89degc is filled with 786g of boron trifluoride gas and 709g of dinitrogen difluoride gas you can
how many seconds will be required to produce 10 g of chromium metal by the electrolysis of a crno33 solution using a
assuming that air is 210 percent oxygen by volume what volume of air in liters at 450 degc and 793 mmhg would be
consider a 065 m column with van deemter parameters a022 mm b217 mm mlmin and c0018 mm minml if it takes at least 85
the plate height in a particularly packed gas chromatography column is characterized by the van deemter equation with
1nbspcalculatenbspthe grams of na2co3nbsprequired to prepare 2500 ml of 0375 m na2co3nbspsolution2nbspthe reaction of
write the balanced equation for the reaction of calcium metal with iron iii nitrate the coefficients on calcium metal
aluminum displaces cobalt from a 02 m solution of cobaltii perchlorate cobalt does not displace chromium from a
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write an essay about molecular modelling its uses and applications and use a freely available modelling software from