# Charge contained in this gas

#### rayhan619

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

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#### berkeman

Mentor
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...

#### rayhan619

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

Mentor
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.... #### rayhan619

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

Mentor
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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