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A typical exchange current density, that for H+ discharge at platinum,is 0.79 mA cm-2 at 25°C. What is the current density at an electrode when itsoverpotential is
(a) 10 mV,
(b) 100 mV,
(c) -5.0 V? Take a = 0.5.
How is the concentration of Cl determined by mercuric nitrate? Is there a color change at various levels? (similar to the Cl test for swimming pools and you'd have to match a particular color to a particular concentration?)
Mathematically determine which acid contributes a larger concentration of H3O+ ions into the solution, be sure to report the H3O+ concentrations for both, label them clearly, and identify which substance creates a larger concentration?
What is the molar solubility of Mns, in grams per liter, in a buffer solution that is 0.110 M HC2H3O2 -0.505 M NaC2H3O2? For Mns
How much 6.00 M NaOH must be added to 580.0 mL of a buffer that 0.0195 M acetic acid and 0.0250 M sodium acetate to raise the pH to 5.75
If you a litre (1000mL) bottle of oil in your engine, how much heat is produced in kcal?In BTU To solve this problem you must know the density of motor oil is .82 g/mL.
the element lead pb consists of four naturally occurring isotopes with atomic masses 203.97302205.97444206.97587 and
Calculate the standard molar enthalpy of formation ?H°f of N2H4(g) from the following information: N2(g) + 2H2(g) ? N2H4(l) ?H°rxn = +50.6 kJ N2H4(g) ? N2H4(l) ?H°rxn = -44.8 kJ A. +5.8 kJ/mol B. +95.4 kJ/mol C. +47.7 kJ/mol D. -95.4 kJ/mol E. -5...
how much NaCl is present in one serving (105g ) of chips? Express your answer to three significant figures and include the appropriate units. (in grams)
Lactic acid (abbreviated HL) is made into a 0.100 M solution whose pH = 2.44. What is the ka for HL
The mass of the crucible plus CaO was 26.7134 g). What is the concentration of Ca (40.078 g/mol) in the river water in units of part per thousand (ppt) (by mass), assuming the river water has the same density as pure water
It takes 10 microliters of solution to produce a spot 1 cm in diameter. If the co(no3)2 solution contains about 6g co2+ per liter, how many micrograms of co2+ ion are there in one spot
Calculate the electrical work done buy a dry cell in 1.00 H if it produces a steady current of 0.70 A at 1.5 V. Answer expressed in jeules.
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