What would happened to the mass of the copper II carbonate when you heated it in the reaction ?

The total mass in a reaction never changes. An example is heating copper carbonate. It breaks down into copper oxide and carbon dioxide.

b. acid is the correct answer @jayxboof all social media

acid : acids are those which accepts an electron-pairs.

base : bases are those which donates ab electron-pairs.

alkali : it is a base that dissolves in water. it is basically a base and the ph greater than 7.

hydroxide ion : it is a poly-atomic ion which is negatively charged.

1.solid

2.carbon dioxide

3.helium