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The concentration of ascorbic acid (vitamin C) in a new beverage is to be determined using a new electrochemical sensor.A 20.00 mL sample of the beverage gave a reading of 2.05 µA. A second aliquot of 20.00 mL was spiked with 1.0 mL of 0.0804 M ascorbic acid.The spiked sample gave a reading of 3.86 µA.
What is the concentration of ascorbic acid in the beverage (to 2 s.f.) in M?
What volume of 0.205 M K3PO4 solution is necessary to completely react with 122mL of .0110M of NiCl2? 2K3PO4+3NiCl2=Ni3(PO4)2+6KCl
calculate w and ?u when 1 mole of xenon gas assumed ideal under goes adiabatic expansion from 27?c to 127? assumingheat
an unknown monoprotic acid is titrated with 38.10mL of 0.265 M NaOH. Calculate the molar mass of the acid.
How many molecular orbitals are present in the valence band of a sodium crystal with a mass of 5.90g?
What is the molarity of a NaOH solution if 48.0 mL of a 0.220 M H2SO4 solution is required to neutralize a 25.0-mL sample of the NaOH solution
A testing facility found that 8.35*10^23 molecules of carbon dioxide were produced when a sample of octane was burned in air. If this combustion process is known to produce an 86.7% yield, how many grams of octane were in the sample?
Calculate the number of grams of glucose must be dissolved in water in order to produce 100.0 ml of a 3.700 M glucose solution (C6H12O6). Density = 2.601
The standard enthalpy of formation of gaseous H2O at 298 K is -241.82 kJ mol-1. Estimate its value at 75 °C given the following values of the molar heat capacities at constant pressure:
Barium chromate dissolved upon treatment with nitric acid forming an orange solution. Write a net ionic equation to represent the overall reaction that occurs.
Lactase, an enzyme found in the small intestine, cleaves the milk sugar lactose to yield glucose and galactose. Assuming that the km for lactose is 0.9mM, vmax is 3.5 micromole/min/mg lactase, 5.7 micromoles lactose is presesnt
Why is it more difficult to identify all of the components of a mixture than it is to identify the cation and anion that make up a simple salt
the vapor of a volatile liquid is able to fill a 408-mL flask at 100.4C and 765mm Hg, what is the molar mass of the liquid?
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