Posted by **Timoefy** on Friday, May 24, 2013 at 3:47pm.

Estimate the number of moles of gas (and mass of gas assuming that it is all N2) inside your family car (or a friends if you don't have one). If the amount of gas was compressed at constant temperature to fit inside a coke can what would the pressure inside the coke can be?

Did i solve this correctly,

28.317 l x 115ft^3 = 3256 l at a standard temperature (0 C, 40 F)

3256 l x 1mole N2/22.44 l = 145.4 moles N2

Number of moles = 145.4 moles N2

145.4 moles N2/22.4 l = 6.49

28/6.49=4.3

Im kind of stuck right here, what do i need to do next?

- Chemistry -
**Timoefy**, Friday, May 24, 2013 at 3:54pm
Also, are the units correct here, what are the units that should be on 6.49 ex.?

- Chemistry -
**DrBob222**, Friday, May 24, 2013 at 4:57pm
**I assume 28.317 is the conversion factor for cubic feet to L and I assume 115 ft^3 is the volume of the inside of the car.**

28.317 l x 115ft^3 = 3256 l at a standard temperature (0 C, 40 F)

3256 l x 1mole N2/22.44 l = 145.4 moles N2

Number of moles = 145.4 moles N2

**You are ok to here although I didn't check the math. I don't get what follows.**

145.4 moles N2/22.4 l = 6.49

28/6.49=4.3

**You have mols (assuming the math is right) at 145.4. Convert to mass by
**

145.5mol x (28 g/1 mol) = ?

Then to convert to pressure inside a coke can, it will be

PV = nRT. You know n,R, T and you will need the volume of the empty coke can. Solve for pressure in atm.

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