Download Science Tests ~ Chemistry

Science Tests ~ Chemistry
…a companion to the Science Mentor ~ Chemistry
SET 1
1. Select the answer below that has the elements
arranged in order of increasing electronegativity.
A. K, O, F, C
B. O, F, C, K
C. K, F, C, O
D. K, C, O, F
E. None of these is correct.
2.
Colligative properties of solutions include ____ .
A. osmotic pressure
B. lowering of vapor pressure
C. freezing point depression
D. boiling point elevation
E. all of the above
3.
Express the density of lead (11.34 g/cm3) in
lbs./ft3. 1 lb = 453.6 g; 1 inch = 2.54 cm.
A. .300 lb/ft 3
B. 16.4 lb/ft 3
C. 0.0250 lb/ft 3
D. 4.92 lb/ft 3
E. 0.410lb/ft 3
4.
What is the mass in grams of 1.52 x 1030
molecules of SO2?
A. 1.62 x 108 g
B. 2.53 x 106 g
C. 64.06 g
D. 2.00 x 108 g
E. none of these
5.
What coefficients are needed to balance the
following equation?
____ P4O10 + ____ H2O ö ____ H3PO4
A. 2, 12, 8
B. 1, 1, 1
C. 1, 6, 3
D. 1, 6, 4
E. 1, 2, 6
6.
How many neutrons are in one stable atom of
59
Co?
A. 59
B. 86
C. 32
D. 33
E. not enough information
7.
What volume of 12.0 M HCl is required to
prepare 300 mL of a 3.00 M HCl solution for use
in the lab?
A. 900 mL
B. 100 mL
C. 750 mL
D. 0.100 mL
E. 75.0 mL
8.
Which compound does not contain an ionic
bond?
A. NaCl
B. H2O
C. CaCl2
D. K2S
E. MgS
9.
What is the best name for the compound Cl2O7?
A. chlorine heptoxide
B. chlorine dioxide
C. dichlorine tetroxide
D. dichlorine heptoxide
E. chlorine oxygen
10. What type of reaction is the following ____ .
SO2 (g) + H2O (l) ö H2SO3 (aq)
A. decomposition
B. oxidation/reduction
C. single replacement
D. combination/synthesis
E. neutralization
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Science Tests ~ Chemistry - continued
240. When calculating the mass of atoms, we use the
atomic weight scale. This scale uses the atomic
mass unit (amu) which is based on ___ .
A. the mass of one atom of uranium
B. the mass of one atom of carbon-14
C. 1/12 of the mass of a carbon-12 atom
D. 1/12 of the mass of a carbon-14 atom
E. the average mass of an atom of hydrogen at
STP
241. A stable atom has 27 electrons. We could call it
____ .
A. aluminum
B. silicon
C. fluorine
D. chlorine ion
E. none of these
242. A magnesium ion (Mg2 + ) is considered to have
____ .
A. lost two neutrons.
B. lost two protons.
C. gained two electrons.
D. lost two electrons.
E. gained two neutrons.
243. An insoluble solid has a mass of 17.8 g. It is
placed in a graduated cylinder with 30.0 mL of
water. After being placed in the cylinder, the
new volume is 34.2 mL. What is this
substances’s density?
A. .238 g/mL
B. .520 g/mL
C. 4.24 g/mL
D. 1.69 g/mL
E. 1.92 g/mL
244. The gram formula mass (GFM) or molar mass of
magnesium phosphide is?
A. 55.28 g/mol
B. 141.5 g/mol
C. 262.9 g/mol
D. 154.84 g/mol
E. 134.84 g/mol
245. How many moles of potassium chloride are in
500 mL of a 0.25 M KCl solution?
A. .25 mol KCl
B. 9.32 mol KCl
C. .125 mol KCl
D. 74.6 mol KCl
E. 18.6 mol KCl
246. The electron configuration 1s2 2s2 2p6 3s2 3p3
could represent ____ .
A. a phosphorus ion
B. a magnesium ion
C. a phosphorus atom
D. a sodium atom
E. a sodium ion
247. What mass of oxygen is necessary to react with
18.0 g of methane?
A. 32.0 g
B. 71.8 g
C. 15.99 g
D. 44.0 g
E. 18.0 g
248. Which of the following names does not match the
formula listed?
A. potassium nitrate : KNO3
B. sodium hypochlorite : NaClO3
C. hydrogen chloride : HCl
D. sulfuric acid : H2SO4
E. dichlorine heptoxide : Cl2O7
249. Of the following chemical reactions, which
would be considered a neutralization reaction?
A. 2Al + 6 HCl !3H2 + 2AlCl3
B. Mg + F2 ! MgF2
C. PCl3 + Cl2 ! PCl5
D. 2H2O !2H2 + O2
E. 2HI + Ca(OH)2 !2H2O + CaI2
250. An atomic mass unit (amu) as defined by the
International Union of Pure and Applied
Chemistry is ____ .
A. the mass of 1 mole of carbon atoms
B. exactly 1/12 the mass of 1 carbon-12 atom
C. the mass of 1 amu
D. the mass of the electrons in 1 magnesium
atom (atomic number 12)
E. none of these
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