Chapter 3 Mastering Chemistry

4. The formula mass of calcium nitrate, Ca(NO3)2 is Hints A. 82 g/mol. B. 164 g/mol. C. 102 g/mol. D. 116 g/mol.

164 g/mol.

6. Balance the equation for the formation of ammonia from hydrogen gas and nitrogen gas using the lowest possible set of integer coefficients. What is the coefficient in front of ammonia, NH3, in the balanced equation? N2 (g) + H2 (g) → NH3 (g) Hints A. 2 B. 1 C. 3 D. 4

2

5. The mass percent of hydrogen in hydrogen peroxide, H2O2, is Hints A. 3.0%. B. 5.9%. C. 11%. D. 50%.

5.9%

1. Which of the statements below concerning chemical bonds is TRUE? Hints A. An ionic bond occurs when a metal atom and a nonmetal atom share a pair of electrons. B. All chemical bonds involve the sharing of electrons between two atoms. C. A covalent bond occurs when one or more electrons are transferred from a metal atom to a nonmetal atom. D. An ionic bond occurs when one or more electrons are transferred from a metal atom to a nonmetal atom.

An ionic bond occurs when one or more electrons are transferred from a metal atom to a nonmetal atom.

13. Which of the following contains BOTH ionic and covalent bonds? A. BaSO4 B. COS C. CaCl2 D. SF6 E. None of the above contain both ionic and covalent bonds.

BaSO4

9. What is the empirical formula of a compound that is 62.0% C, 10.4% H, and 27.5% O by mass? A. C6H12O2 B. C3HO C. C5H10O2 D. C3H6O E. C6HO3

C3H6O

12. Determine the molecular formula of a compound that is 49.48% carbon, 5.19% hydrogen, 28.85% nitrogen, and 16.48% oxygen. The molecular weight is 194.19 g/mol. A. C8H12N4O2 B. C8H10N2O C. C8H10N4O2 D. C4H5N2O

C8H10N4O2

10. Write the formula for copper (II) sulfate pentahydrate. A. Cu2S • H2O B. CuS • 5H2O C. CuSO4 • 5H2O D. (CuSO4)5 E. Cu2SO3 • H5

CuSO4 • 5H2O

7. Part A What is the name for the compound PCl5? Spell out the full name of the compound. Part B What is the name for the compound B2H6? Spell out the full name of the compound.

Part A: phosphorus pentachloride Part B: diboron hexahydride

16. Classify each of the following compounds as ionic or molecular. Drag the appropriate compounds to their respective bins.

Molecular: HCN, CCl4, and NI3 Ionic: PtO2 and Pb(NO3)2

14. Part A Which of the following would you expect to be a molecule and which would you expect to be part of an ionic solid? Drag the appropriate compounds to their respective bins. Part B Classify the following compounds as having covalent or ionic bonds. Drag the appropriate compounds to their respective bins.

Part A: Molecular: HCl, CO, and SO Ionic: KCl, NaI, MgO, KF, and CaS Part B: Covalent Bonds: phosphorous trichloride and sulfur trioxide Ionic Bonds: barium chloride, potassium iodide, strontium iodide, and aluminum sulfide

20. Write a ratio showing the relationship between the amounts of each element for each of the following:(Figure 1) Part A (a) A. 2O:C B. 3O:C C. O:2C D. O:C Part B (b) A. H:2O B. 2H:2O C. 3H:O D. 2H:O Part C (c) A. 3H:O B. 2H:O C. H:2O D. 2H:2O https://drive.google.com/file/d/0B4_51_spvHBTSy01UnRkVjdWVWM/view?usp=sharing&resourcekey=0-XffaWYSsAZ1V3Uc8eyRvjA

Part A: 2O:C Part B: 2H:2O Part C: 2H:O (Use the link to see the answer)

18. Write a formula for each of the following molecular compounds. Part A astatine monobromide Express your answer as a chemical formula. Part B dichlorine monoxide Express your answer as a chemical formula. Part C dinitrogen trioxide Express your answer as a chemical formula. Part D diboron trioxide Express your answer as a chemical formula.

Part A: AtBr Part B: Cl2O Part C: N2O3 Part D: B2O3

15. Part A What is the name of the acid whose formula is HI? Spell out the full name of the acid. Part B What is the formula for chlorous acid? Express your answer as a chemical formula. Part C What is the name of the acid whose formula is H2CO3? Spell out the full name of the acid. Part D What is the formula for sulfurous acid? Express your answer as a chemical formula.

Part A: hydroiodic acid Part B: HClO2 Part C: carbonic acid Part D: H2SO3

8. Part A What is the systematic name of Mg(NO3)2? Part B What is the systematic name of NH4ClO3? Part C What is the systematic name of PbO?

Part A: magnesium nitrate Part B: ammonium chlorate Part C: lead(II) oxide

19. Use the nomenclature flow chart (the following figure) to name each compound. Part A HNO2(aq) Spell out the full name of the compound. Part B B2Cl2 Spell out the full name of the compound. Part C BaCl2 Spell out the full name of the compound. Part D CrCl3 Spell out the full name of the compound.

Part A: nitrous acid Part B: diboron dichloride Part C: barium chloride Part D: chromium(III) chloride

17. Name each of the following molecular compounds. Part A PBr3 Spell out the full name of the compound. Part B XeF8 Spell out the full name of the compound. Part C XeF6 Spell out the full name of the compound. Part D NO Spell out the full name of the compound.

Part A: phosphorus tribromide Part B: xenon octafluoride Part C: xenon hexafluoride Part D: nitric oxide

2. Benzene has the chemical formula C6H6. Which of the statements below about benzene is TRUE? Hints A. The empirical formula of benzene is CH. B. The molecular formula of benzene is CH. C. The molecular formula of benzene is C12H12. D. The molecular and empirical formulas for benzene are the same.

The empirical formula of benzene is CH.

3.The correct name for P2O5 is Hints A. diphosphorus pentoxide. B. phosphorus (V) oxide. C. phosphorus (II) oxide D. phosphorus oxide.

diphosphorus pentoxide.

11. Give the name for H2SO4. A. persulfuric acid B. sulfuric acid C. hyposulfurous acid D. sulfurous acid E. persulfurous acid

sulfuric acid