Ascuba tank has a pressure of 195 atm at a temperature of 10 degree celsius. the volume of the tank is 350 l. how many moles of air are in the tank?

The answer is 2939 moles.

Explanation:

To obtain the moles from these values yo should apply the ideal gas formula because in a scuba tank all gas that you have inside is air:

PV= nRT. (1)

Thus the moles number, n, is:

n = PV/ RT (2)

Where:

P is pressure: 195 atm;

V is volume: 350 L,

R is gas constant: 0,082 atm×L / mol×K

And T is temperature: 10°C, that must be converted in k, thus:

10°C + 273,15 = 283,15 K

Replacing these values in (2) the moles number, n, is:

2939 moles of air

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