CHEM 1364 Test 1 Spring 2000

1. __________________ is the study of matter and the changes that matter can undergo.

2. A(n) __________________ has a fixed composition, with distinct chemical and physical properties. It consists of elements and compounds.

3. The SI system has seven ____________ units, with all other units considered derived units.

4. _________________ properties are those (like density) which do not depend on the amount of material present.

5. ____________________ is a term we use to indicate that replicate measurements are very close to each other.

6. ___________________ rays were determined to be negatively charged streams of matter.

7. In the 'banana nut bread' model of the atom, the __________________ are represented by the nuts.

8. A(n) _________________ is an atom of a specific isotope of the element.

9. A(n) _______________ is the term used to describe both monoatomic and polyatomic negatively charged ions.

10. The prefix bi- in the name of an ion (such as the biphthalate ion), indicates the presence of _________________ in the polyatomic ion.

11. ____________________ reactions are characterized by one reactant forming two or more products.

12. The ____________ scale is based on the mass of ¹²C being defined as exactly 12 of these units.

13. The most useful units for molecular weight are ___________ per ___________.

14. ____________________ analysis is often used to determine the empirical formula of hydrocarbons.

15. The ________________ yield for a reaction is how much product you actually obtain after the reaction has reached completion.

16. Perform the following conversions:

a) 345 nautical miles to km ( 1 nautical mile = 1.852 km)

b) 152 knots to meters / second (1 knot is 1 nautical mile / hour)

c) The mass of a pine deck that measures 7.0 m x 6.0 m x 4.2 cm. The density of pine is 0.83 g/cm³.

17. Fill in the missing information in the following table.

18. Write the name of the following chemical compounds:

a) NH₄Cl _____________________________

b) Cu(C₂H₃O₂) _____________________________

c) FeO _____________________________

d) HCl _____________________________

e) N₂O₅ _____________________________

19. Guanabenz is a drug that is used as an antihypertensive agent. Elemental analysis of guanabenz shows the following percent composition of elements: 41.58%C, 3.49%H, 30.69% Cl, and 24.25%N. Calculate the empirical formula for guanabenz.

20. When silver nitrate reacts with copper metal, copper(II) nitrate and silver metal are formed. If 17.0 g of silver nitrate is reacted with 4.77 grams of copper metal, 9.93 grams of silver metal is recovered. What is the limiting reactant? Calculate the percent yield for this reaction. [Be sure to write the balanced chemical equation for the reaction!!!]

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