When you first bottle champagne is there any pressure inside?

A: Yes, as I stated, there's about 90psi in a standard champagne bottle?

What happens if too much pressure occurs inside a champagne bottle?

A: Obviously, past a certain psi, it will break.

If 2 bottles of the same pressure and temperature have different sizes. is there a difference in the amount of gas?

A: This is my question...unlike the problem that I previously posted a link to, the 9L bottle in question tonight is going to be a 7*C (constant),....so no fluctuation up or down in temperature.

Do you really think a glass bottle can expand in size by increasing pressure?

A: The short answer is obviously, No. I'm sure that the bottle might expand on some infinitesimal level before breaking, but that is the not question at hand.

I'm familiar with PV=nRT

I guess what I'm confused about is where they got this answer:

moles CO2 in gas = 0.00752

...towards the bottom of their calculation (of Example 10-9) in the link that I mentioned above:

http://www.wpi.edu/Academics/Depts/Chemistry/Courses/General/concep10.htmlOnce I find out how they got that, then the PV=nRT is simple....I just don't understand how they mathematically derived moles CO2 in gas = 0.00752.

If I just blindly use their 0.00752 conclusion in the PV=nRT calculation:

PCO2 = nRT/V = (0.00752)(0.08206)(280)/9L = 0.019 atm (which is ~ 0.2792psi)....which is obviously not right.

So, what am I not seeing here?