9 Pages

Course Code
CHEM 101
Mary Shoemaker

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C101 Fall 2013 Practice Exam 1 3 1. If a 5.00-g sample of a metal has a volume of 1.30 cm , what is the density of the metal? A) 38.5 g/cm 3 B) 3.85 g/cm 3 3 C) 0.0260 g/cm D) 3 g/cm 3 E) 5.00 g/cm 3 2. The density of isopropyl alcohol is 0.79 g/mL. What is the mass of 39.5 mL of isopropyl alcohol? A) 0.020 g B) 39.5 g C) 40. g D) 31. g E) 50. g 3. Express 230790 in scientific notation. A) 2.30790 x 10 5 5 B) 2.3079 x 10 1 C) 2.3079 x 10 D) 2.30790 x 10 -5 5 E) 2.3 x 10 4. How many liters are in 4,769 mL? A) 4,769 L B) 4,769 x 10 L -2 C) 47.69 L D) 4.769 L E) 4.769 x 10 L 3 5. Using the rules of significant figures, calculate the following: 7.72 – 0.021 = A) 7.6990 B) 7.699 C) 7.70 D) 7.7 E) 8. Page 1 6. The product of (0.01400) × (1.3379 x 10 ) will have how many significant figures? A) 2 B) 3 C) 5 23 D) 10 E) 4 7. Aluminum metal is an example of A) a homogeneous mixture B) a heterogeneous mixture C) a compound D) an element 8. Which of the following is a chemical change? A) A match ignites and burns B) Water evaporates from the ocean C) Melted wax can be poured into container and harden D) A white t-shirt is tie-dyed blue and red E) Salt dissolves in water 9. Which of the following elements forms diatomic molecules A) sulfur B) helium C) neon D) bromine E) cesium 10. Which of the following elements has chemical properties most similar to sodium? A) Mg B) Ne C) K D) N 11. How many protons are in the nucleus of a Hg (mercury) atom? A) 40 B) 80 C) 200.59 D) 201 E) 121 Page 2 12. What is the most abundant element by mass on the earth (including the crust, oceans, and atmosphere)? A) silicon B) oxygen C) hydrogen D) carbon E) iron 13. The symbol for the element silver is A) S B) Si C) Ag D) Au E) Sr 14. The symbol Pb stands for the element A) phosphorus B) palladium C) polonium D) lead E) tin 15. The symbol for chlorine is A) Ch B) C C) Cl D) F E) Cn 16. How many nitrogen atoms are indicated by the formula Mg3 2 ) ? A) 1 B) 2 C) 3 D) 6 E) 9 17. The chemical formula F3 4 indicates A) three atoms of iron and four atoms of oxygen B) four atoms of iron and three atoms of oxygen C) seven atoms of each element D) twelve atoms of each element E) one atom of each element 18. How many protons, electrons, and average number of neutrons, respectively, does Nickel have? A) 7, 7, 7 Page 3 B) 28, 28, 28 C) 28, 28, 59 D) 31, 28, 59 E) 28, 28, 31 19. How many total atoms are represented by one formula unit of barium carbonate, BaCO ?3 A) 5 B) 6 C) 14 D) 18 E) 25 20. The maximum number of electrons allowed in one orbital is A) 2 B) 4 C) 8 D) 18 E) none of these 21. There is a combined maximum of 8 valence electrons in the s and p orbitals. What element(s) have 7 valence electrons? A) oxygen B) all elements on the periodic table C) the halogens D) nitrogen E) no element has 7 valence electrons 22. The alkaline earth metals in column 2 of the periodic table each have how many valence electrons? A) 8 B) 7 C) 3 D) 2 E) 1 23. The noble gases each contain how many valence electrons? A) 1 B) 7 C) 0 D) 8 E) none of these 24. The correct electron configuration for Si is A) 1s 2s 2p 3s 3p 3d4 Page 4 2 2 6 2 6 1 B) 1s 22 22 3s63p94s C) 1s 2s 2p 2d D) 1s 2s 2p 3s 3p2 2 E) none of these 2 2 6 2 6 25. What element has the electron configuration 1s 2s 2p 3s 3p ? A) Ar B) Cl C) Kr D) S E) Ne 26. Rank the following from smallest to largest atomic radius. A) Li, C, Na, K B) K, Li, Na,
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