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Charge contained in this gas

  • Thread starter rayhan619
  • Start date
1. Homework Statement

Suppose you have 2.0 mol of O2gas.
How many coulombs of positive charge are contained in this gas in the atomic nuclei?


2. Homework Equations

q = Ne

3. The Attempt at a Solution

i guess i have to use the avogadros's number somehow. but not sure how does that fit in this equation
 

berkeman

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i guess i have to use the avogadros's number somehow. but not sure how does that fit in this equation
Yes you do. What is the definition of Avagadro's number? That gets you most of the way to the answer...
 
so we have 6.023*10^23 atoms in 1 mole.
so in 2 mole we have 6.023*10^23*2 = 12.046*10^23 proton
and the charge of each proton is 1.6*10^-19.
so total positive charge would be 1.6*10^-19*12.046*10^23 = 19.27*10^4
but that wasnt the right answer
 

berkeman

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Suppose you have 2.0 mol of O2gas.
How many coulombs of positive charge are contained in this gas in the atomic nuclei?


Re-read the problem statement.... :wink:
 
im sorry i dont get it.
if we use the above equation, then e = q/N = 2/6.023*10^23 = 0.33*10^-23
???
Im lost
 

berkeman

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im sorry i dont get it.
if we use the above equation, then e = q/N = 2/6.023*10^23 = 0.33*10^-23
???
Im lost
The numbers you are using are for a monatomic gas. Oxygen gas is diatomic....
 

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