How many moles of O2 react with 0.800 mol of Cu2O in the following reaction?
2 Cu2O(s) + O2(g) → 4 CuO(s)
1.200 mol
0.400 mol
0.800 mol
1.600 mol

Consider the following system at equilibrium. caco3(s) = ca2+(aq) + co32-(aq) the addition of which compound will cause a shift in equilibrium because of a common ion effect? occia co2 cuso4 na2co3