5th exam for chemistry

5th exam for chemistry - Fifth Exam(MWF) 1. Consider the...

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Fifth Exam (MWF) 1. Consider the following balanced chemical reaction: SF 4(gas) + F 2(gas) SF 6(gas) a. Sulfur has been oxidized as it has gained electrons, whereas fluorine in F 2 has been reduced as it has lost electrons b. Sulfur has been reduced as it has lost electrons, whereas fluorine in F 2 has been oxidized as it has gained electrons c. Sulfur has been oxidized as it has lost electrons, whereas fluorine in F 2 has been reduced as it has gained electrons d. Sulfur has been reduced as it has gained electrons, whereas fluorine in F 2 has been oxidized as it has lost electrons e. None of the above 2. What is the oxidation number of S in SF 6 a. +2 b. +4 c. +5 d. +6 e. None of the above 3. Which of the following is not an example of an oxidation-reduction reaction? a. CaC 2 O 4(solid) CaCO 3(solid) + CO (gas) b. P 4(solid) + 5 O 2(gas) 2P 2 O 5(solid) c. Al (solid) + KOH (aq) + 3H 2 O KAl(OH) 4(aq) + 1.5 H 2 d. PCl 3(gas) + Cl 2(gas) PCL 5(gas) e. None of the above
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4. Which of the following statements correctly give the criteria for a spontaneous oxidation-reduction reaction? a. G is negative and E Δ cell is negative b. G is positive and E Δ cell is negative c. G is negative and E Δ cell is positive d. G is positive and E Δ cell is positive e. Both G and E Δ cell are equal to zero
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5th exam for chemistry - Fifth Exam(MWF) 1. Consider the...

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