Answer:
expands
Explanation:
Most substances become increasingly compressed when frozen solid, but water is a famous exception.
+2
Barium has a positive charge of 2
Answer:
In complete combustion, there is a sufficient supply of oxygen which is able to react with the burning hydrocarbon allowing the reaction products H2O and CO2 to be formed. In incomplete combustion there is a lack of oxygen so when heat is applied carbon monoxide is released.
