Question

Calculati masa de oxid de calciu care contine aceeasi cantitate de calciu ca si 296 grame hidroxid de calciu

Answer 1

M,CaO= (40gCa+16gO)/mol= 56g/mol
M,Ca(OH)2= (40gCa + 2x1gH+2X16gO)/mol= 74g/mol
74g Ca(OH)2...........40gCa
296g......................m= 160g Ca

56gCaO.........40gCa
x....................160g
x= ..................calculeaza !!!!!!