Verified Answer :

Willchemistry

Cu + 2 AgNO₃ =  2 Ag + Cu(NO₃)₂

mole ratio:

1 mole Cu --------------> 2 moles Ag
? mole Cu --------------> 3.50 moles Ag

moles Cu = 3.50 x 1 / 2

moles Cu = 3.50 / 2

= 1.75 moles

Answer:

1.75 moles of copper must react to form 3.50 moles of silver metal.

Explanation:

\(Cu+2AgNO_3\rightarrow Cu(NO_3)_2+2Ag\)

According to reaction 2 moles of silver are obtained from 1 mole of copper metal.

Then 3.5 moles of silver will be obtained from:

\(\frac{1}{2}\times 3.5 mol=1.75 mol\) of copper metal

1.75 moles of copper must react to form 3.50 moles of silver metal.

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