Assuming the pressure is constant, what temperature (in °C) is needed to

[Anton A]

reduce the volume to 2.05 L? A sample of sulfur hexafluoride gas occupies a volume of 5.40 L at 190.5°C

[vkreddy2003]

From gas laws Charles lawV1/T1 = V2/T2 remember to Convert temp to Kelvin and use SI system5.40/ 273+190.5 = 2.05/ T2(K)calculate and u will get the answer in Kelvin temperature scale and convert it to centigrade by subtracting 273.K= 273+ CentigradeT2(K) = 2.05 x 463.5/5.40 I think you can do it now, key is converting centigrade scale to kelvin and using SI system and knowing gas laws from ur classroom