Answer:
1.24 moles
Explanation:
first find the molar mass of AgNO3, which I got 169.877
then, divide the number of moles used by the Molar mas
210/169.877 = 1.2361 = 1.24
Since, the molar ratios of AgNO3 and Ag are the same (2:2), the answer will be 1.24
