Nivyan M. answered 06/11/19
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Hi Eve!
The number of formula units of AgNO3 can simply be found by multiplying the moles by Avogadro's number:
formula units = moles x Avogadro's number = 7.25 moles*6.02*1023 formula units/mole = 4.3645*1024 formula units
Hope this helps!