Объяснение:
Mr(Ca(OH)2 = 40 + 16*2 + 1*2 =74
W(O) = Ar(O) *n / Mr(Ca(OH)2) *100% = 16*2 / 74 *100% =43%
Объяснение:
Mr(Ca(OH)2 = 40 + 16*2 + 1*2 =74
W(O) = Ar(O) *n / Mr(Ca(OH)2) *100% = 16*2 / 74 *100% =43%