In a single replacement reaction, how do you compute the theoretical mass of silver?

Question

Cu/Ag Single Replacement experiment. Mass of AgNo3=1.52g; mass of silver produced=.861.g; mass of copper reacted=.23g

Answer 1

Cu + 2AgNO3 = 2Ag + Cu(NO3)2

the moles of Cu 0.23 / 64 = 3.59*10^-3
the moles of Ag : 3.59*10^-3 * 2 = 7.18 * 10^-3
the mass of Ag : 7.18*10^-3 * 108 = 0.78 g