How Many Coulombs of Positive Charge Are in the Nuclei of 2.0 Mol of O2 Gas?

[rayhan619]

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?

Homework Equations

q = Ne

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]

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]

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 don't get it.
if we use the above equation, then e = q/N = 2/6.023*10^23 = 0.33*10^-23
?
Im lost

 

[berkeman]

im sorry i don't 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...