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How many of the following reagents react...

How many of the following reagents react with arene diazonium slats to form aryl halides?
i. `HBF_(4)//Delta`
ii. `KHS`
iii. `CuCN//KCN`
iv. `CuBr//HBr`
v. `Cu//HCl`
vi. `KI//Delta`
vii. `CH_(3)CH_(2)OH`
viii. `H_(3)PO_(2)//H_(2)O`

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