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12. Use the following conversions :

T(K) = T(^OC) + 273

where, T(K) = Temperature in Kelvin

T(^OC) = Temperature in degree Celsius

So, 
T(K) = -196 + 273 = 77 K

13. The particles of gases have large intermolecular spaces. This shows that most of the volume in a gas is empty space.

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