Question

________ is a compound.

1. Air
2. Copper
3. Water
4. Silver

Answer 1

Explanation:

Publisher Summary

This chapter discusses heat and chemical change. Application of heat to certain substances causes only physical changes in which no new substance or substances are formed. Application of heat to some substances causes chemical changes, or chemical reactions, in which one or more new substances are formed, with different properties from the original. Decomposition of water occurs during electrolysis, in which a current of electricity is passed through a solution containing a little sulfuric acid

Answer 2

Answer:

Water is a compound .

2 is correct