Question

Calculati masa unui amestec format din 5 moli carbonat de calciu si 2 moli sulfat de calciu

Answer 1

calculam masa fiecaruia
M(CaCO3)=40+12+3*16=100 g/mol
m(CaCO3)=5mol*100g/mol=500g
M(CaSO4)=40+32+4*16=136 g/mol
m(CaSO4)=2mol*136g/mol=272g
m(amestec)=500g+272g=772g