1)Change the following temperatures to Kelvin: 100 C and -20 C 2)Change the following temperatures to Celsius: 273 K and 15 K

373 K; 253 K

0°C ; -258°C

Explanation:

In order to change Temperatures to Absolute Value (Kelvin) you shoud do this sum:

T° in C  + 273 = T° in K

For question 1:

100°C + 273 = 373K

-20°C + 273 = 253K

For question 2:

T° K - 273 = T° C

273 K - 273 = 0°C

15 k + 273 = -258 °C

- aluminum and copper chloride.

- the chloride ion to separate the aluminum from the oxygen so that the aluminum can react with the copper ions (and the water molecules).