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Given the following information: Mass of ascobic acid present in one tablet= 500mg preparation of vitamin solution: Vitamin Tablet= 1.5; weigh boat+ Vitamin tabet clushed= 5.2; weigh boat after transfer of crushed tablet= 3.8; Calculated mass of crashed tablet =1.4 preparation of patassium iodate solution: weigh boat + KIO3(s)=1.01; weigh boat after transfer of KIO3(s)=3.9; Calculated mass of KIO3(s)= 2.9 Titration volumes of KIO3: Volume of KIO3 used= tria1=20.88 trial 2= 20.25 a)Calculate the concentration of the potassium iodate solution in mol/L b) use the two titrations to calculate the average moles of iodate ions added to ascobic acid solution c) calculate the average moles of ascobic acid in the pipetted sample used for titration d)Calculate the average moles of ascobic acid in the crushed tablet.
At 100 degrees C, the vapor pressure of water, methanol, and ethanol are 760, 2625, and 1694 torr, respectively. Which counpound has the highest normal boiling point.
Octane has a density of 0.692 g/mL at 20 degrees Celsius. How many grams of O2 are required to burn 1.00 gal of C8H18?
Chlorine gas can be produced commercially by passing an electric current through a concentrated solution of sodium chloride (brine).
calculate enthalpy change for the quantity of zinc reacted. Be sure to follow the significant figures convention in the answer you report.
the vapor leaving the top of a distillation column goes to a condenser in which either total or partial condensation takes place.
How can you distinguish chemically between starch and three other carbohydrates (sucrose, glucose, & lactose)? What would you expect to observe when adding one drop of iodine-potassium iodine reagent to each of the four carbohydrates?
Find the volume of a gas inside a cylinder - What will be the resulting volume of this gas?
Silver has two isotopes and an average atomic mass of 107.87 amu. If 48.18% of Ag exists as Ag-109 (108.9047 amu), what is the identity of the other isotope?
Find delta H for HCl(g) given H-Cl bond enthalpy = +431 kJ·mol-1;
In a calorimeter, 100 g of ice melts at 0oC. The enthalpy of fusion of the ice is 334 J/g. How much heat was absorbed.
Hydrogen bonds a) play an important role in the solvent properties of water b) are not involved in protein structure c) play a role in the properties of DNA, but not of RNA d) give water a lower boiling point than expected 44
What is the density of a block of marble that occupies 253 cm and has a mass of 752 g? Answer in units of g/cm
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