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Calculate the vitamin C content of a green pepper (mg vitamin C/g green pepper) if 19 grams of green pepper was extracted into a total extract volume of 54 mLs. Then 5.00 mL of the extract was titrated to the endpoint with 16 mLs of N-bromosuccinimide(NBS). Each mL of NBS corresponds to 0.25 mg of vitamin C. Write your answer in scientific notation with the correct number of significant figures but do not use units in your answer. For example, 2.50 X 10-3 would be 2.50E-3.
The molar heat capacity of a compound with the formula C2H6SO is 88.0 J/mol-K. what is the specific heat of this substance.
a 255-mL sample of a HCl solution reacts with excess Ca to produce 14.0 L of H2 gas at STP. what is the molarity (M) of the HCl solution? Ca(s) + 2HCl(aq) > CaCl2(aq) + H2(g)
What is the relationship between 2,2-dimethyl[2.2.2.0]tricyclooctane and 3,3-dimethyl[2.2.2.0]tricyclooctane. A. they are constitutional isomers
Draw the structure of 18-crown-6, a compound that is commonly used to bind certain metal ions
A piece of dry ice (solid carbon dioxide) with a mass of 31.5 g is allowed to sublime (convert from solid to gas) into a large balloon.
calculate the equilibrium constant for the reaction. b. what is the chemical significance of the value of the equilibrium constant?
Which of the following is a use for nuclear energy?
Three solutions 61.0 mL of 0.2 M KNO3; 63.0 mL of 0.3 M Ca(NO3)2; and 69.0 mL of 0.385 M KCl were poured together to make one new solution.
Using two different methods, determine delta G degree at 25 degrees for the formation of POCl3 from its constituent elements
Commercial concentrated nitric acid is 69.0 % by mass HNO3 and has a density of 1.42 g/mL. Calculate the molarity of concentrated nitric acid.
find the heat, work , energy, enthalpy, and entropy change for this process.
When a 5.49-g sample of gaseous hydrogen bromide dissolves in 33.0 g of water in a coffee-cup calorimeter (see above figure) the temperature rises from 21.00 oC to 62.66 oC. Calculate H in kJ/mol HBr for the solution process.
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