Question

How many moles of KCLO4 can be produced with 3.45 moles of NaCl. Assume all other reactants are in excess

Answer 1

NOTE question is incorrect: The question should be:
How many moles of KCLO4 can be produced with 3.45 moles of KCl. Assume all other reactants are in excess.
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The reaction involving formation of KClO4 is 

NaClO4      +       KCl     →    KClO4       +       NaCl

From above reaction, it can be seen that 1 mole of NaClO4 reacts with 1 mole of KCl to generate 1 mole of KClO4

Thus, if all other reactant are in excess, 3.45 moles of KCl  will react with 3.45 moles of NaClO4 to form 3.45 moles of KClO4.