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12) 12) Choose the best classification of the reaction represented by the following equation: 2Fe3 (ag)+...


12) 12) Choose the best classification of the reaction represented by the following equation: 2Fe3 (ag)+ Fe(s)3Fe2+(ag) A) ox
12) 12) Choose the best classification of the reaction represented by the following equation: 2Fe3 (ag)+ Fe(s)3Fe2+(ag) A) oxidation-reduction B) combustion C) decomposition D) precipitation E) acid-base 13) 13) Prozac, a drug prescribed to treat depression, has the formula C17H18F3NO. If a patient was administered 15.0 mg of Prozac, how many moles of Prozac did he receive? [Molar mass: Prozac, 309.36 g/mol] A) 20.6 mol B) 48.5 mol C) 2.92 x 1019 mol D) 4.85x 10-5mol E) 4640 mol 14) How is the reaction shown below best classified? 14) 2NaCl(s)+ F2()2NaF(s)+ Cl2(e) A) single-replacement B) combination C) precipitation D) double-replacement E) decomposition 5) How many molecules of water are present in a 5.65 mole sample of water? A) 9.39 x 10-24 molecules B) 1.07x 1023 molecules C) 3.40 x 1024 molecules D) 4.00x 1025 molecules E) 4.00 x 1024 molecules 15)
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Answer #1

12)
In reactant, oxidation state of Fe is +3 and 0
In product, oxidation state of Fe is +2

So,
Oxidation state of Fe is changing from +3 to +2 which is reduction.
Oxidation state of Fe is changing from 0 to +2 which is oxidation.

So, there is both reduction and oxidation taking place.

Answer:   A

13)
Mass = 15.0 mg = 0.0150 g
Molar mass = 309.36 g/mol

Use:
Number of mol = mass / molar mass
= 0.0150 g / 309.36 g/mol
= 4.85*10^-5 mol

Answer: D

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