Chemistry, 13.03.2020 21:48 lukeakalucas
A particular electrochemical instrument has a limit of quantitation corresponding to 0.100 μA (Ipc) in cyclic voltammetry. An experiment was performed for the reduction of Cd2+(aq) to metallic Cd using a circular glassy carbon electrode of 5.0 mm diameter and a sweep rate of 50 mV·s-1. The diffusion coefficient for hydrated Cd2+ is 6.1x10-6 cm2·s-1. What is the minimum theoretical concentration of Cd2+ that can be quantified? [Hint: use the Randles-Sevcik equation with a constant of 2.69x105 C·mol-1·L·m-3·V-½ rather than the usual 2.69x108 C·mol-1·V-½ and note there are 1000 L in 1 m3).
Answers: 3
Chemistry, 21.06.2019 14:00
Consider the balanced equation below. n2h4 + 2h2o2 n2 + 4h2o what are the mole ratios of hydrazine (n2h4) to hydrogen peroxide (h2o2) and hydrazine to water? 1: 2 and 1: 4 1: 3 and 1: 4 1: 2 and 3: 5 1: 3 and 3: 5
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Chemistry, 21.06.2019 18:00
Acylinder is filled with 2.00 moles of nitrogen, 3.00 moles of argon and 5.00 moles of helium. if the gas mixture is at stp, what is the partial pressure of the argon
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Chemistry, 22.06.2019 10:10
What shape would a molecule with two bound groups and two lone pairs have?
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A particular electrochemical instrument has a limit of quantitation corresponding to 0.100 μA (Ipc)...
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