Question

273c Celsius to Kelvin scale

Answer 1

To change from Celsius to Kelvin 
⇒  K° = C° + 273
⇒ 273 + 273
⇒ 546°K
∴ 273°C is 546°K

Answer 2

From Celsius to Kelvin=(°C+273)
From Kelvin to Celsius=(K -273)
According to your question

273 ° C To Kelvin Scale => 273°C+273= 546 K