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1441test1 - 1441 Test One Chapters 1 and 2(McMurry/Fay...

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1441 Test One Chapters 1 and 2(McMurry/Fay) Website: http://dipowell1.home.mindspring.com Use of the Periodic Table: 1. Which of the following statement is/are true? (a) 18/8 O and 19/9 F have the same number of neutrons (b) 14/6 C and 14/7 N are isotopes (c) 18/8 O 2- and 20/10 Ne have the same number of electrons (d) a and b (e) a and c 2. Which compound has the largest molecular mass? (a) C 2 H 4 O (b) CO 2 (c) CH 3 Cl (d) C 2 H 2 3. An atom of Bromine- 79 contains how many protons, neutrons, and electrons? Significant Digits 4. What is the answer to the following in the correct number of significant digits: (16.778 – 15.99) / 118.9 Homogeneous, Heterogeneous, States of Matter 5. Which of the following transitions involves a chemical change? (a)heterogeneous mixture homogeneous matter (b) compounds elements (c) water ice (d) homogeneous mixtures pure substances Dimensional Analysis 6. How many nanoseconds are there in 35 ms? 7. If an automobile is able to cover 22 miles on one gallon of gasoline, what is the gas mileage in Km/L? ( 1.61 Km = 1 mi, 1 L = 1.057 qt ) Writing formulas for and naming ionic compounds 8. Which of these formulas are incorrect? (a) CaPO 4 (b) (NH
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