2.60 moles.
Zn (s) + 2 Ag+ (aq) --> 2 Ag (s) + Zn2+ (aq), each mole of zinc gives out two moles of silver. Therefore, 1.30 moles of zinc will displace 2.60 moles of silver. ( 1.30 × 2)
More about silver nitrate:
An inorganic substance with the chemical formula AgNO3 is silver nitrate. This salt serves as a flexible base for numerous different silver compounds, including those employed in photography. Compared to halides, it is far less light-sensitive. Lunar caustic was previously the name given to it since early alchemists referred to silver as luna and connected it to the moon.
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