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If a student performed the experiment illustrated in this module. She first standardized her DCP solution by preparing an ascorbic acid solution containing 46mg of reagent-grade ascorbic acid. Three 10.00mL samples of the ascorbic acid solution necessary an average of 25.7mL of titrant for the complete reaction.
1) Compute the mean molarities of the DCP solution.
What is the stoichiometric coeffiecient for oxygen gas when the following reaction is balanced using the smallest whole number coefficients? C12H26(g) + O2(g) --> CO2(g) + H2O(g)
A welder's acetylene tank has a volume of 75.0L. It is stored at a temperature of 23.24 degrees C and has a pressure of 7667kPa. How many moles of acetylene are in the tank
What is the pH (to nearest 0.01 pH unit) of a solution prepared by mixing 87.0 mL of 0.0601 M NaOH and 71.0 mL of 0.0138 M Ba(OH)2
Solubility constant for is 8.1E-12. When is in equilibirum with its ions in saturated solution. The concentration of silver ions.
an unknown liquid with boiling range of 179-181 C is insoluble in water, gives a blue green suspension with chromic acid and immediately forms a separate layer when shaken with Lucas' reagent.
Calculate the molar absorptivities for In- at 454 and 654nm, set up two simultaneous equations, and determine the molar concentrations of HIn and In- in the buffer solutions
1.girl a dilutes 10 ml stock solution to a final volume of 20 ml. girl b dilutes 10 ml stock solution to a final volume
Lindane is a popular pesticide throughout the south because it is a persistent chemical (i.e. it remains in the environment and offers protection for a long period of time)
give the complete mechanism for the formation of dibenzalacetone starting from benzaldehyde and acetone. make sure to
What is the partial pressure in atm of N2 of ths mixture if it is held in 12.60-L vessel at 15 degrees celcius. What is the partial pressure in atm of H2 of this mixture if it is held in a 12.60 -L vesssel at 15 degrees celcius
The sample is titrated to the phenolphthalein endpoint with 15.17 mL of a sodium hydroxide solution. What is the molar concentration of the NaOH solution
A student reacts 0.3000 grams of a sulfate-containing unknown with excess barium chloride. If 0.6500 grams of barium sulfate is produced, what is the percentage sulfate in the unknown?
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