Question

The temperature of a sample of gas is changed, causing the volume to go from 3500 cm' to 4700 cm3. If the new temperature is 717K, what was its original temperature in Kelvin?

Answer 1

Answer: 534 kelvin
Here you use Charles law which states that volume is directly proportional to temperature you don’t need to change cm3 to dm3 because both of the volumes have the same unit
V(old)/t(old)=V(new)/t(new)
4700/717=3500/t solve by cross multiply or calculator