chemistry

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the activity series of metals is:
Au < Ag < Cu < Sn < Cd < Zn < Al < Mg < Na < Cs
which reaction below occutrs spontaneously upong mixing the reageant shown?
a) Sn(s) + Al3+ (aq)-> sn2+(aq) + al(s)
b) sn(s) + zn 2+ (aq) -> sn 2+ (aq) +zn (s)
c) zn (s) + au 3+ (aq) -> zn 2+ (aq) + au (s)
d) ag(s) + mg 2+ (aq) -> ag+ (aq) + mg (s)
e) ag(s) + mn2+ (aq) -> ag+(aq) + mn(s)

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