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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