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question archive 1) What are the EDG and hybridization of the central atom in H2CO? The number in the formula is a subscript

1) What are the EDG and hybridization of the central atom in H2CO? The number in the formula is a subscript

Subject:ChemistryPrice: Bought3

1) What are the EDG and hybridization of the central atom in H2CO? The number in the formula is a subscript. Optional Answers:

1. Trigonal planar; sp2

2. Tetrahedral; sp2

3. Tetrahedral; sp3

4. Trigonal planar; sp3

 

2. In this course, a double bond is comprised of:

Optional Answers:

1. two pi bonds.

2. two sigma bonds.

3. a sigma bond and a pi bond.

4. one pi bond.

 

3. In this course, what types of orbitals can form pi bonds? Optional Answers:

1. Only unhybridized p orbitals.

2. Only hybrid orbitals.

3. Hybrid and unhybridized orbitals of any type.

4. Only hybridized s orbitals.

 

4. Which of the following choices would have the LARGEST number of pi bonds?

Optional Answers:

1. A molecule with seven single bonds.

2. A molecule with three double bonds.

3. A molecule with two triple bonds.

 

5. A structure contains a carbon-carbon double bond with like groups on the same side of the double bond. This structure is referred to as a(n): Optional Answers: 1. formal charge. 2. resonance structure. 3. trans isomer. 4. cis isomer.

 

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9.4

 

1. What is the oxidation state of chlorine in ClF3?

Optional Answers:

1. -1

2. -3

3. +3

4. +1

 

2. Which of the following is NOT a reasonable oxidation state for phosphorus?

Optional Answers:

1. +5

2. -3

3. -5

4. +3

 

3. What are the formal charge (FC) and oxidation state (OS) of the nitrogen atom in ammonia? Optional Answers:

1. FC = -3, OS = 0

2. FC = -3, OS = -3

3. FC = 0, OS = 0

4. FC = 0, OS = -3

 

4. In the reaction 2Na + Cl2 -> 2NaCl, which species is the reducing agent?

Optional Answers:

1. Cl2

2. Na

 

5. For the reaction Mg + Zn2+ -> Zn + Mg2+, which of the following statements is FALSE?

Optional Answers:

1. Zn2+ undergoes reduction

2. Magnesium loses electrons

3. Magnesium is the oxidizing agent

4. Magnesium is a more active metal than zinc

 

6. From the reactions shown: copper displaces silver ions and iron displaces copper ions. Iron reacts with acid, but copper does not. Rank the species in order of INCREASING activity.

Optional Answers:

1. Fe < H2 < Cu < Ag

2. Fe < Cu < H2 < Ag

3. Ag < H2 < Cu < Fe

4. Ag < Cu < H2 < Fe

 

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9.5

 

1. In a 3.0 M solution of aluminum fluoride, what are the concentrations of the major species present?

Optional Answers:

1. 3.0 M Al3+ and 9.0 M F

2. 3.0 M Al3+ and 6.0 M F

3. 3.0 M AlF3

4. 3.0 M Al3+ and 3.0 M F

 

2. 100. mL of a 4.00 M sulfuric acid solution is diluted to 200. mL. What is the new concentration of the sulfuric acid solution?

Optional Answers:

1. 4.0 M

2. 2.0 M

3. 1.0 M 4. 8.0 M

 

3. An acidic solution will have a pH of:

Optional Answers: 1. > 7 2. = 7 3. < 7 4. Which of the following would be MOST suitable as an antacid? Optional Answers:

1. A strong base

2. A weak acid

3. A strong acid

4. A weak base

 

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