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Study Guide for Chapters 3 & 4 (With Answers)

by: Corey Stewart

Study Guide for Chapters 3 & 4 (With Answers) CHEM 1110 - 01

Marketplace > East Tennessee State University > Chemistry > CHEM 1110 - 01 > Study Guide for Chapters 3 4 With Answers
Corey Stewart

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About this Document

These two chapters dealt a lot with calculations, so that's what this study guide mostly is. If you have any questions feel free to contact me.
Gen Chem
Study Guide
General Chemistry, Stoicheometry, Chapter3, chapter4
50 ?




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This 5 page Study Guide was uploaded by Corey Stewart on Monday October 10, 2016. The Study Guide belongs to CHEM 1110 - 01 at East Tennessee State University taught by Mohseni in Fall 2016. Since its upload, it has received 10 views. For similar materials see Gen Chem in Chemistry at East Tennessee State University.


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Date Created: 10/10/16
Study Guide 1. What is the molar mass of C H2CO5H? A. 148 g/mol B. 62.5 g/mol C. 73.0 g/mol D. 112 g/mol E. 74.0 g/mol 2. How many moles of CO are 2here in 10.0 g? A. 1.00 mol B. 0.0227 mol C. 4.401 mol D. 44.01 mol E. 0.227 mol 3. How many grams of platinum (Pt) are in 0.475 mole Pt? A. 195 g B. 0.0108 g C. 0.000513 g D. 0.00243 g E. 92.7 g 4. How many atoms are in 1.00 × 10 g of U? Molar mass U = 238.03 g/mole. 14 A. 6.02 × 10 atoms B. 4.20 × 10 atoms 12 C. 2.53 × 10 atoms D. 3.95 × 10 –31atoms 21 E. 2.54 × 10 atoms 5. Calculate the number of moles of calcium in 2.53 moles of Ca (P3 ) 4 2 A. 2.53 mol Ca B. 0.432 mol Ca C. 3.00 mol Ca D. 7.59 mol Ca E. 0.843 mol Ca 6. A sample of sodium carbonate, Na CO 2 is3found to contain 10.8 moles of sodium. How many moles of oxygen atoms (O) are present in the sample? A. 10.8 mol O B. 7.20 mol O C. 5.40 mol O D. 32.4 mol O E. 16.2 mol O 7. How many g of iron are required to use up all of 25.6 g of oxygen atoms (O) to form Fe O ? 2 3 A. 59.6 g B. 29.8 g C. 89.4 g D. 134 g E. 52.4 g 8. A sample was analyzed and found to contain 0.1417 g nitrogen and 0.4045 g oxygen. What is the percentage composition of this compound? 9. The combustion of a 13.660 g sample of a compound of C, H, and S in pure oxygen gave 19.352 g CO a2d 11.882 g of H O. 2alculate the empirical formula of the compound. A. C H S 4 12 B. CH S 3 C. C H2S 6 D. C H S 2 6 3 E. CH S 3 2 10. The empirical formula of hydrazine is NH , and its molecular mass is 32.0. What is its molecular 2 formula? Atomic Mass: N = 14.007; H = 1.008; O = 15.999 A. NH 2 B. N 2 4 C. N 3 6 D. N H 4 8 E. N 1.5 3 11. Balance each of the following equations. What are the coefficients in front of each compound? __ Ba(OH) (2q) +__ Na SO 2aq)4→ __ BaSO (s) + 4_ NaOH(aq) ___KClO (s) → ___KCl(s) +___ O (g) 3 2 __H P3 (a4) + __ Ba(OH) (aq2 → __Ba (PO ) 3s) 4 2_H O(l ) 2 12. In a cup of coffee that has milk and sugar in it, which are the solutes and which are/is the solvent(s)? A. Solutes: caffeine, sugar, and milk proteins Solvent: water B. Solute: water Solvents: caffeine, sugar and milk proteins C. Solutes: sugar and milk proteins Solvents: water and caffeine D. Solute: milk protein only Solvent: water and milk 13. Which of the following is not electrically balanced? + – A. Ag (aq) + Cl (aq)  AgCl(s) B. NH (aq) + H O  NH (aq) + H O (aq) + 4 2 3 3 C. NO (aq) + H O  HNO (aq) + OH (aq) – 2 2 2 D. Mg (aq) + 2OH (aq)  Mg(OH) (s) 2 E. Cu (aq)+ Sn(s)  Cu(s) + Sn (aq) 2+ 14. Consider the following molecular equation: (NH )4 2 (a4) + Ba(CH CO ) 3aq)2 22NH CH CO (aq)4+ B3SO (2) 4 Write the correct net ionic equation. 2+ 2– A. Ba (aq) + SO (aq)4→ BaSO (s) 4 + – B. 2NH (aq4 + 2CH CO (aq3 → 22H CH CO (s) 4 3 2 C. Ba (aq) + SO (aq) → BaSO (aq) 4 4 D. 2NH (aq4 + Ba (aq) + SO (aq) + 24H CO (aq) → 2N3 (aq2 + 2CH CO (aq) 4 BaSO (s) 3 2– 4 E. 2NH (aq4 + 2CH CO (aq3 → 22H CH CO (aq) 4 3 2 15. Which of the following is a weak acid? A. HCl (hydrochloric acid) B. HNO (n3tric acid) C. HClO (perchloric acid) 4 D. HC H O2(3ce2ic acid) E. H 2O (4ulfuric acid) 16. Will mixing aqueous solutions of K SO and 2a(N3 ) yield a pr3 2pitate? 17. Which of the following combinations will not react? (Remember what means a reaction has taken place.) A. Na CO (aq) + HCl(aq) 2 3 B. Na S2 (a3) + CaCl (aq)2 C. NaCl(aq) + HC H O2(a3)2 D. NH Cl(4q) + Ba(OH) (aq) 2 E. KCN(aq) + H SO 2aq)4 18. How many grams of KMnO must you w4igh out if you want to make 250.mL of a 0.200 M KMnO solution? 4 A. 7900 g B. 50.0 g C. 0.316 g D. 7.90 g E. 198 g 19. What volume of 12.1 M HCl is needed to create 250. mL of 3.2 M HCl? (Think V * M = V * M ) 1 1 2 2 A. 66 mL B. 800 mL C. 3025 mL D. 945 mL E. 9680 mL 20. A 25 mL of 6.0 M HCl is diluted to 500 mL with water. What is the molarity of the resulting solution? (Think 1 * M1= V 2 M )2 A. 150 M B. 3.0 M C. 0.120 M D. 120 M E. 0.30 M 21. A 4.000 g sample that contains sodium carbonate and an inert, soluble salt is dissolved in 100 g of water. Hydrochloric acid is added to react with the carbonate ions. If 33.5 mL of 0.525 M HCl was required to just completely react with all of the sodium carbonate, what was the mass percent of sodium carbonate in the original sample? A. 0.466% B. 23.3% C. 23,300% D. 46.6% E. 0.233% Study Guide Answer Key 1. E 2. E 3. E 4. C 5. D 6. E 7. A 8. 74.06 % 9. C 10. B 11. 1,1,1,2 2,2,3 2,3,1,6 12. A 13. E 14. A 15. D 16. Yes 17. D 18. D 19. A 20. E 21. B


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