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CHM 1040: Final Review
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Chemical equations..
(A) describe chemical reactions
(B) give directions for naming chemical compounds
(C) show how to write chemical equations
(D) describe only biological changes
(A) describe chemical reactions
The complete combustion of which of the following substances produces carbon dioxide and water?
(A) NO
(B) K
2
CO
3
(C) Ca(HCO
3
)
2
(D) C
4
H
10
(D) C
4
H
10
Which of the following is evidence for a chemical reaction?
(A) a gas is detected
(B) a precipitate is formed
(C) a color change is observed
(D) light is produced
(E) all of the above
(E) all of the above
Classify the following reaction:
(NH
4
)
2
Cr
2
O
7
-> NH
3
+ H
2
O + Cr
2
O
3
(A) decomposition
(B) single-replacement
(C) combination
(D) double replacement
(A) decomposition
Spectator ions are..
(A) the ions that will be represented on the left side of an equation as hydrated ions, while on the right side of the equation, will be represented as part of the compound that formed a precipitate
(B) none of these are correct
(C) a, b, & c are all correct
(D) ions formed by an element from group IA
(E) the ions that do not undergo any change during a reaction
(E) the ions that do not undergo any change during a reaction
In a chemical reaction an atom of sulfur gains 2 electrons to become
(A) oxidized
(B) an anion
(C) a cation
(D) all of these
(E) none of these
(B) an anion
Which of the following is NOT correct regarding the reactants of a chemical reaction?
(A) They are the substances that interact with one another.
(B) The mass of the products is usually a little than the mass of the reactants.
(C) A plus sign (+) is used to separate one from another
(D) They are written on the left side
(B) The mass of the products is usually a little than the mass of the reactants.
Compounds containing only 2 chemical elements are called
(A) heterogeneous substances
(B) mixtures
(C) binary compounds
(D) ternary compounds
(E) none of these
(C) binary compounds
Because atoms are so ______, the standard units of mass are not useful in measurements.
(A) electrically charged
(B) varied
(C) unstable
(D) scattered
(E) small
(E) small
Choose the false statements.
(A) 6.022 x 10
23
hydrogen atoms weigh 1.008 g.
(B) 1 mol of carbon atoms weighs 12.0 g.
(C) 6.022 x 10
23
atoms = 1 mol atoms
(D) Oxygen is a diatomic gas
(E) 1 mol = 6.022 x 10
23
amu
(E) 1 mol = 6.022 x 10
23
amu
The empirical formula for acetic acid is CH2O. Its molar mass is 60g/mol. The molecular formula is
(A) CH
2
O
(B) C
2
H
4
O
2
(C) C
2
H
6
O
(D) C
2
HO
2
(E) none of the above
(B) C
2
H
4
O
2
The oxygen-to-hydrogen mass ratio of water is always 8.0 is an example of what fundamental law?
(A) Law of Constant Composition
(B) Law of Constant Mass Ratio
(C) Law of Conservation of Mass
(D) Law of Constant Whole Number Ratio
(E) none of the above
(A) Law of Constant Composition
Which of the following is a molecular compound?
(A) barium sulfide
(B) calcium
(C) potassium hydroxide
(D) nitrogen monoxide
(E) none of the above
(D) nitrogen monoxide
What metric prefix is used to designate 1/1000?
(A) kilo
(B) milli
(C) micro
(D) mega
(E) nano
(B) milli
Cesium melts at 302 K and boils at 944 K. Whatr is the physical state of cesium at 25 degree celsius?
(A) liquid
(B) plasma
(C) solid
(D) colloid
(E) gas
(C) solid
Author
kieu
ID
82480
Card Set
CHM 1040: Final Review
Description
CHM 1040: Final Review
Updated
4/28/2011, 7:52:20 PM
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