Question

Ca=cao=ca(oh)2=cacl2=ca(no3)2=caco=cao

Answer 1

2Ca + O2 = 2CaO

CaO + H2O = Ca(OH)2

Ca(OH)2 + 2HCl = CaCl2 + 2H2O

CaCl2 + 2AgNO3 = Ca(NO3)2 + 2AgCl

Ca(NO3)2 + Na2CO3 = CaCO3 + 2NaNO3

CaCO3 =(t°)= CaO + CO2