Question

Chlorine melts at 172 K. What is chlorine’s melting point in °C?

Answer 1

-101.5 celcius and exactly that

Answer 2

Since we know chlorine melts at 172 K, we know this is chlorine's melting point. To convert from kelvin to Celsius, you can subtract 273. Therefore, when you do 172-273 you get -101 Celsius degrees which is the final answer.

I hope this helps.