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A vitamin C tablet was dissolved in 50.0 mL of distilled water, and then titrated with 0.0100 M KIO3; 16.57 mL of KIO3 solution was needed to reach the endpoint. Calculate the grams of vitamin C were in the tablet?
You are given 100g agarose (which makes a gel when dissovled in boiling water) and 100 ml buffer. Show how you would prepare 50 ml of a 1.2% agarose gel. weight and volume do not add up
Calculate the ratio of [Ca2+] to [Fe2+] in a lake in which the water is in equilibrium with deposits of both CaCO3 and FeCO3, assuming that the water is slightly basic and that the hydrolysis of the carbonate ion can therefore be ignored.
if the solubility of AgNO3 at 40oC is 211 g per 100 g of water, what mass of this solute can be dissolved in 350 g of water at the same temperature?
If performing a HPLC on a complex mixture what things might I do to increase the resolution of the spectra. Be specific here please
After it reaches steady state, the iron is quickly cooled to room temperature. The carbon concentration at the carbon-rich surface is determined to be 8.415x10^0 at%
Calculate pCu at the equivalence point in the titration of 20.0 mL of 0.0161 M CuSO4 with 0.0100 M EDTA at pH 8.00.
Given an unknown monoprotic(one hydrogen) acid. Make a 100 mL solution with 20% by volume. (mix 20 mL acid with 80 mL water) and titrate with NaOH. You must find the concentration of it the weak acid.
The normale boling point of acetone is 56.2 C and its Hvap is 25.5kJ mol. At what temperature does acetone have a vapor pressure of 425mmHg?
Calculate the delta G at 400K for the following phase change: Sulfur(monoclinic) to sulfur rhombic. Do not assume that delta H or delta S are independent of temperature
The standard enthalpy of sublimation of carbon dioxide is 26.3 kJ/mol at 190 K. Estimate the standard enthalpy of formation of solid carbon dioxide at 298 K, in kJ/mol.
A certain metal crystallizes in a face-centered cubic arrangement. If it rearranges to a simple cubic structure, what will happen to the density of the metal
A 100-watt lightbulb radiates energy at a rate of 100 J/s.(The watt, a unit of power, or energy over time, is defined as 1 J/s.) If all of the light emitted has a wavelength of 525 nm, how many photons are emitted per second
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