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CHEM 150 Study Guide - Final Guide: Electron Rest Mass, Electrochemical Cell, Gas Constant

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salmonraven689
3 Dec 2021
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UCSB
Department
Chemistry and Biochemistry
Course
CHEM 150
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Related Questions

The molecular mass of helium is 4 g/mol, the Boltzmann’s constant is 1.38066 × 10-23 J/K, the universal gas constant is 8.31451 J/K · mol, and Avogadro’s number is 6.02214 × 1023 /mol. Given: 1 atm = 101300 Pa.
1. How many atoms of helium gas are required to fill a balloon to a diameter of 34 cm at 61oC and 0.863 atm?
2. What is the average kinetic energy of each helium atom? Answer in units of J.
3. What is the RMS speed of each helium atom? Answer in units of m/s.

I need help calculating some problems dealing with Avogadro'sNumber and Faraday's Constant. Here is what I have so far:
Initial mass of copper anode: 35.00 g
Initial mass of copper cathode: 34.85 g
Time of electrolysis: 15 Min.
Current: 12V
Final mass of copper anode: 34.95g
Final mass of copper cathode: 34.79g

What I need:
Mass of copper oxidized at anode (g):
Moles of copper oxidized (mol):
Moles of electrons transferred (mol e-):
Coulombs passed through cell (C):
Electrons passed through cell (e-):
Avogadro's number (e-/mol e-):
Average value of Avogodro's number:
Percent Error:
Faraday constant (C/mol e-):
Average Faraday constant (C/mol e-):
Literature value of Faraday constant:
Percent error:

I have about 20 of these to do but I'll be ok if I can see howthey're calculated. Thanks for your help.

An electrochemical cell has an Eocell of 2.00 V and transfers 1 mole of electrons. The Faraday constant is 96,485 C/mol e-. What is the value of delta G?