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Chemical Formulas & Bonds Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Page 1

Question 1 1. Which type of formula gives us the simplest ratio of the atoms of elements present in a chemical compound?

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Question 2 2. Which of the following formulas is already in its reduced form or simplest ratio?

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Question 3 3. What is the correct empirical formula for the molecular formula below?

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Question 4 4. An anion has a(n) _____ charge.

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Question 5 5. An ionic bond occurs when a _____ and an _____ come together and form a bond.

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Page 2

Question 6 6.

Which of the following statements is true?

I. In an ionic bond, electrons move toward the atom that is more electronegative.

II. A cation is a negatively charged atom.

III. A positively charged atom is called an anion.

IV. Under biological conditions, ionic bonds are stronger than covalent bonds.

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Question 7 7.

Which of the following statements are true?

I. Noble gases complete their valence level by sharing electrons.

II. Covalent bonds are weak and easily broken.

III. Covalent bonds allow us to make predictions on how the molecule will look.

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Question 8 8. How does an atom try to achieve a complete valence shell?

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Question 9 9. If a silicon atom has four valence electrons, what is the maximum number of bonds it can form?

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Question 10 10. What is the name of the following compound?

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Page 3

Question 11 11. Which of the following atoms are always present in an organic compound?

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Question 12 12. What is the name of the following compound?

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Question 13 13. In chemistry, the Greek letter delta:

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Question 14 14.

What differentiates a nonpolar covalent bond from a polar covalent bond?

I. Unequal sharing of electrons

II. Ions

III. Atoms of partial charge

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Question 15 15. Two atoms with the same electronegativity would form what kind of bond?

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Page 4

Question 16 16. The dipole-dipole interaction that results from the attraction of partially positive hydrogen atoms to non-bonding pairs of electrons in a partially negative atom of another molecule is called _____.

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Question 17 17. Equal sharing of electrons within the covalent bonds of a molecule results in a _____ molecule.

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Question 18 18. The forces that exist between non-polar molecules like the ones found in gasoline are known as _____.

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Question 19 19. Which of these is NOT part of what IUPAC determines for a chemical compound?

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Question 20 20. Why is IUPAC nomenclature important?

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Page 5

Question 21 21. Which of the following is NOT a responsibility of IUPAC?

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Question 22 22. What increases the vapor pressure of a compound?

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Question 23 23. What increases the van der Waals dispersion forces (London forces)?

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Question 24 24. What increases the boiling point of a compound?

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Question 25 25. A polar molecule, such as the one involved in a hydrogen bond, is sometimes called _____.

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Page 6

Question 26 26. Which of the following is MOST likely to result in a hydrogen bond?

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Question 27 27.

Hydrogen bonds occur between hydrogen in one polar molecule and _____ in another polar molecule.

I. Oxygen

II. Fluorine

III. Nitrogen

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Question 28 28. Which of the following is the correct condensed structural formula for:

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Question 29 29. A cation has a _____ charge.

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Question 30 30.

If a carbon atom has four valence electrons, which of the following statements are TRUE?

I. Carbon can form a triple covalent bond with another carbon atom.

II. A carbon atom CANNOT form two double bonds simultaneously.

III. A carbon atom can form four single covalent bonds simultaneously.

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Chemical Formulas & Bonds Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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