Question

3 moli de carbonat de cupru se ddscompun ce substanta si ce greutate rezulta

Answer 1

3 moli.........................a g .......... b g

CuCO3  __toC__> CuO  +  CO2

   1............................... 80..........44

CuO = oxid de cupru

CO2 = dioxid de carbon

=> a = 3x80/1 = 240 g CuO

=> b = 3x44/1 = 132 g CO2