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Please help me, i don't know how to approach this question!

All ammonium salts on heating with sodium hydroxide produce ammonia gas. From which ammonium salt can the greatest mass of ammonia be obtained?

a)0.5 mol of (NH4)3PO4
b)0.5 mol of (NH4)2SO4
c)1 mol of NH4Cl
d)1 mol of NH4NO3

How do i calculate? The correct answer is A.

Please help, thanks!

  • CHEM -

    a) if you have three ammonium ions per molecule, then .5 moles ofthe salt will produce 1.5 moles ammonia.

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