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Answer:
I think it is 7.9 moles of water
Explanation:
FeS=56+32=88
88×4.5 =396g
H2SO4=2+32+64=98
98×3=294
H2O=2+16=18
18×7.9=142.2
C12H22O11=144+22+176=342
1×342=342
SO LIGHTEST IS 7.9 MOLES OF WATER
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