10 out of 10 points

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| According to VSEPR theory, which one of the following molecules should have a bent shape?Answer| | | |

| Selected Answer:| Cl2O|

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* Question 2

10 out of 10 points

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| According to the VSEPR theory, the molecular shape of SiCl4 isAnswer| | | | | Selected Answer:| tetrahedral.|

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* Question 3

10 out of 10 points

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| According to the VSEPR theory, the shape of the SO3 molecule isAnswer| | | | | Selected Answer:| trigonal planar. |

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* Question 4

10 out of 10 points

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| Balance the following equation using the smallest set of whole numbers, then add together the coefficients. Don't forget to count coefficients of one.

___ Al + ___ H2SO4 → ___ Al2(SO4)3 + ___ H2

The sum of the coefficients isAnswer| | | |

| Selected Answer:| 9.|

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* Question 5

10 out of 10 points

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| Consider the species Cl2+, Cl2, and Cl2−. Which of these species will be paramagnetic?Answer| | | | | Selected Answer:| Cl2+ and Cl2−|

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* Question 6

10 out of 10 points

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| How many O atoms are there in 51.4 g CaSO4?Answer| | | | | Selected Answer:| 9.09 × 1023|

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* Question 7

10 out of 10 points

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| How many covalent bonds will a nitrogen atom usually form?Answer| | | | | Selected Answer:| 3|

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* Question 8

10 out of 10 points

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| How many grams of Cl2 can be prepared from the reaction of 16.0 g of MnO2 and 30.0 g of HCl according to the following chemical equation?

MnO2 + 4HCl → MnCl2 + Cl2 + 2H2OAnswer| | | |

| Selected Answer:| 13.0G|

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* Question 9

10 out of 10 points

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| How many grams of sodium are there in 10. g of sodium sulfate, Na2SO4?Answer| | | | | Selected Answer:| 3.2|

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* Question 10

10 out of 10 points

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| In which of the following would the bonding be weakened with the addition of an electron to form the negative molecular ion?Answer| | | | | Selected Answer:| N2|

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* Question 11

0 out of 10 points

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| In which of these pairs of atoms would the bond have the greatest percent ionic character (i.e., most polar)?Answer| | | | | Selected Answer:| c-o s-o f--f|

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* Question 12

10 out of 10 points

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| Indicate the type of hybrid orbitals used by the central atom in PCl3.Answer| | | | | Selected Answer:| sp3|

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uestion 13

10 out of 10 points

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| The F−S−F bond angles in SF6 areAnswer| | | | | Selected Answer:| 90° and 180°.|

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* Question 14

10 out of 10 points

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| The Lewis dot symbol for the a lead atom isAnswer| | | | | Selected Answer:| |

Not A| | | |

* Question 15

10 out of 10 points

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| The Lewis structure for CS2 is:Answer| | | |

| Selected Answer:| |

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* Question 16

10 out of 10 points

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| The number of pi bonds in the molecule below is

Answer| | | |

| Selected Answer:| 3|

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* Question 17

10 out of 10 points

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| The number of resonance structures for the nitrate ion that satisfies the octet rule isAnswer| | | | | Selected Answer:| 3|

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Question 18 Question 18

10 out of 10 points

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| The shape of the CS2 molecule is best described asAnswer| | | | | Selected Answer:| linear.|

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* Question 19

0 out of 10 points

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| What is the formal charge on sulfur in the best Lewis structure for the SCN− (thiocyanate) ion?Answer| | | | | Selected Answer:| −1 +2 -2+1|

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* Question 20

10 out of 10 points

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| What type of chemical bond holds the atoms together within a water molecule?Answer| | | | | Selected...