Răspuns:
CaCl2 clorura de claciu -saruri
1 atom Ca si 2 atomi Cl
MCaCl2=40+2×35,5=111g/mol
111gCaCl2...........40gCa............71gCl
100CaCl2.............xgCa.....................ygCl
x=100×40/111= calculeaza
y=100×71/111= calculeaza
m=2,5×111= calculeaza
Explicație:
