In the redox reaction agno3 + na nano3 + ag, how many electrons were transferred?

             One Electron is transferred.

Explanation:

The reaction is as follow,

                                 AgNO₃ + Na    →    NaNO₃ + Ag

Reduction of Ag;

                                             AgNO₃ + 1 e⁻   →    Ag
Oxidation State                     +1                            0

Oxidation of Na;

                                            Na    →    Na⁺  +  1 e⁻
Oxidation State                     0             +1

Result:
           Therefore, Sodium transfers one electron to silver to reduce it.

Since there is the same amount of agn03 in both silver chloride and silver nitrate they produce the same amount of moles. therefore silver chloride produces the same amount of silver nitrate, so your answer is 15.0 moles of silver nitrate. i hope this !