Question

Ca---CaH2---Ca(OH)2---CaSO4---Ca(NO3)2

Answer 1

1) ca + h2 -> cah2 2) СаН2 + 2Н2О = Са (ОН) 2 + 2Н2 3)Ca(OH)2 + H2SO4 = CaSO4 + 2H2O 4) CaSO4 + 2HNO3 -> Ca(NO3)2 + H2SO4;