Răspuns:
Explicație:
formula chimica este gresita Ca(HCO3)2
M= (40gCa +2x1gH+2x12gC+6x16gO)/mol=162g/mol
162g sare,,,,40gCa.....2gH.....24gC....96gO
100G.................X..............Y..........Z.........T]
X= 100x40/162=.....................calculeaza
Y=100X2/162=...........................
Z= 100X24/162=...................
T= 100X96/162=.......................
