Which substance can be decomposed by chemical means? a. cobalt b. krypton c. methane d. zirconium?

Methane, answer c, can be decomposed by chemical means because methane is a compound. Methane is made up of one atom of carbon and four atoms of hydrogen. Compounds can be broken down. Cobalt, krypton, and zirconium are all elements, and elements cannot be chemically decomposed.

8.7 degrees celsius and 15.6 degrees fahrenheit

Woah that’s a lot to read xd i’ll try though. i’ll get back t you if. i know the andwer