CHEM 1411 Fall 2017 SS Exam # 1 Name:

Size: px

Start display at page:

Download "CHEM 1411 Fall 2017 SS Exam # 1 Name:"

Noah Craig
5 years ago
Views:

1 CHEM 1411 Fall 2017 SS Exam # 1 Name: 1. What is the physical state in which matter has no specific shape but does have a specific volume? A) gas B) solid C) liquid D) salts E) ice 2. A combination of sand, salt, and water is an example of a. A) homogeneous mixture B) heterogeneous mixture C) compound D) pure substance E) solid 3. A small amount of salt dissolved in water is an example of a. A) homogeneous mixture B) heterogeneous mixture C) compound D) pure substance E) solid 4. Which one of the following has the element name and symbol correctly matched? A) S, sodium B) Tn, tin C) Fe, iron D) N, neon E) B, bromine 5. Which one of the following is often easily separated into its components by simple techniques such as filtering or decanting? A) heterogeneous mixture B) compounds C) homogeneous mixture D) elements E) solutions 6. Which states of matter are significantly compressible? A) gases only B) liquids only C) solids only D) liquids and gases E) solids and liquids

2 7. A 30.5 gram sample of glucose (C6H12O6) contains mol of glucose. A) B) C) 5.90 D) 2.36 E) Gases do not have a fixed as they are able to be. 9. The recommended adult dose of Elixophyllin, a drug used to treat asthma, is 6.00 mg/kg of body mass. Calculate the dose in milligrams for a 134-lb person. A) 20 B) 1,773 C) 1.8 D) 365 E) State the number of significant figures in each value A) B) 54,700 C) D) E) Round the following number to four significant figures and express the result in standard exponential notation: A) B) C) D) E) Complete the calculations to the correct number of significant figures A) = B) = C) = D) = 13. Gold has a density of kg/cm3. What volume (in cm3) would be occupied by a 22.2 g sample of gold? A) B) C) D) E) 1.15

3 14. What decimal power does the abbreviation nano represent? A) B) C) D) E) Express the temperature, K, in degrees Celsius. A) C B) C C) 2.03 C D) C E) C 16. The temperature of 25 C is in Kelvins. A) 103 B) 138 C) 166 D) 248 E) Of the following, the smallest and lightest subatomic particle is the. A) neutron B) proton C) electron D) nucleus E) alpha particle 18. All atoms of a given element have the same. A) mass B) number of protons C) number of neutrons D) number of electrons and neutrons E) density 19. The correct name for HClO3 is. A) hydrochloric acid B) perchloric acid C) chloric acid D) chlorous acid E) hydrochlorous acid

4 20. The correct name for HBrO4 is. A) hydrobromic acid B) perbromic acid C) bromic acid D) bromous acid E) hydrobromous acid 21. Elements exhibit similar physical and chemical properties. A) with similar chemical symbols B) with similar atomic masses C) in the same period of the periodic table D) on opposite sides of the periodic table E) in the same group of the periodic table 22. Which pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties? A) O, S B) C, N C) K, Ca D) H, He E) Si, P 23. The elements in groups 1A, 6A, and 7A are called, respectively. A) alkaline earth metals, halogens, and chalcogens B) alkali metals, chalcogens, and halogens C) alkali metals, halogens, and noble gases D) alkaline earth metals, transition metals, and halogens E) halogens, transition metals, and alkali metals 24. Of the choices below, which one is not an ionic compound? A) PCl5 B) MoCl6 C) RbCl D) PbCl2 E) NaCl 25. Which one of the following molecular formulas is also an empirical formula? A) C6H6O2 B) C2H6SO C) H2O2 D) H2P4O6 E) C6H6

5 26. What is the formula of the compound formed between strontium ions and nitrogen ions? A) SrN B) Sr3N2 C) Sr2N3 D) SrN2 E) SrN3 27. When the following equation is balanced, the coefficients are. C8H18 + O2 CO2 + H2O A) 2, 3, 4, 4 B) 1, 4, 8, 9 C) 2, 12, 8, 9 D) 4, 4, 32, 36 E) 2, 25, 16, When a hydrocarbon burns in air, what component of air reacts? A) oxygen B) nitrogen C) carbon dioxide D) water E) argon 29. When a hydrocarbon burns in air, a component produced is. A) oxygen B) nitrogen C) carbon D) water E) argon 30. Of the reactions below, which one is not a combination reaction? A) C + O2 CO2 B) 2Mg + O2 2MgO C) 2N2 + 3H2 2NH3 D) CaO + H2O Ca(OH)2 E) 2CH4 + 4O2 2CO2 + 4H2O 31. Of the reactions below, which one is a decomposition reaction? A) NH4Cl NH3 + HCl B) 2Mg + O2 2MgO C) 2N2 + 3H2 2NH3 D) 2CH4 + 4O2 2CO2 + 4H2O E) Cd(NO3)2 + Na2S CdS + 2NaNO3

6 32. Which one of the following substances is the product of this combination reaction? A) AlI2 B) AlI C) AlI3 D) Al2I3 E) Al3I2 Al (s) + I2 (s) 33. The formula weight of potassium dichromate (K2Cr2O7 ) is amu. A) B) C) D) E) The mass % of F in the binary compound KrF2 is. A) B) C) D) E) One mole of contains the smallest number of atoms. A) S8 B) C10H8 C) Al2(SO4)3 D) Na3PO4 E) NaCl Extra credit (10 points) When benzene (C6H6) reacts with bromine (Br2), bromobenzene (C6H5Br) is obtained. (a) What is the theoretical yield of bromobenzene in this reaction when 30.0 g of benzene reacts with 65.0 g of benzene? (b) If the actual yield of bromobenzene is 56.7 g, what was the percent yield?

7 Exam 1 Key 1. C 2. B 3. A 4. B 5. A 6. C 7. B 8. Volume, compressed 9. D 10. 4; 3; 6; 2; D ; 20.7; 42; E 14. D 15. C 16. E 17. C 18. B 19. C 20. B 21 E 22. A 23. B 24. A 25. B 26. B 27. E 28. A 29. D 30. E 31. A 32. C 33. D 34. E g; 94.0%

1071-1st Chem Exam (A)

1071-1st Chem Exam (A) 1071-1st Chem Exam-1071017(A) MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The correct answer (reported to the proper number of significant