Which of the following is a decomposition reaction?

BaO + H2O → Ba(OH)2
CH4 + O2 → CO2 + H2O
CaO + CO2 → CaCO3
PbCO3 → PbO + CO2

PbCO3 → PbO + CO2

Explanation:

Decomposition reaction involves the breakdown of a single large chemical compound into two or more smaller ones.

PbCO3 → PbO + CO2

From the above equation, we can clearly see that PbCO3 breaks down to form PbO and CO2

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.