A)Completaţi ecuaţiile chimice următoare cu formulele chimice şi coeficienţii adecvaţi: 2Ca +O2...CaO
...CuCl2 +... CuSO4 + ... HCl
...KClO3... +...O2
...AgNO3 +... H2SO4... +...
...H2 +... N2 ...NH3 1 punct
b) numiți şi clasificaţi substanţele din primele 2 ecuaţii de mai sus.

co2

Explanation:because of the oxygen levels

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)