Chemistry: Matter and Change

Chapter 10: The Mole

Standardized Test Practice

1
What is the SI base unit used to measure the amount of a substance?
A)kilogram
B)mole
C)kelvin
D)meter
2
A water molecule contains one central oxygen atom and two hydrogen atoms. How many oxygen atoms in 2.2 moles of water?

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/007874637x/514706/figure_10_2_water_molecule_circle_only_page_321_2008_CMC.jpg','popWin', 'width=240,height=401,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (51.0K)</a>
A)1.32 x 1024
B)1.32 x 1024
C)1.32 x 1025
D)6.02 x 1023
3
Copper wire consists of copper atoms connected through metallic bonds. Find the moles of copper in 1.87 x 1024 copper atoms.

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/007874637x/514706/figure_10_2_copper_wire_circle_only_page_321_2008_CMC.jpg','popWin', 'width=240,height=408,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (47.0K)</a>
A)1 mole
B)3 moles
C)3.1 moles
D)6.02 x 1023 moles
4
What is the mass of one mole of carbon-12 atoms?
A)12 amu
B)12 grams
C)6 amu
D)6 grams
5
Tungsten is the metal used in most light bulb filaments. One filament contains around 0.018 grams of tungsten. The atomic mass of tungsten is 183.84. How many moles of tungsten are in a light bulb filament?
A)9.8 x 10-5 moles
B)3.3 moles
C)1.1 x 1020 moles
D)0.0054 moles
6
Uranium is a radioactive metal that can be refined and used for nuclear power plants. The atomic mass of uranium is 238. How many uranium atoms are present in 1.00 kg of uranium?
A)4.20 atoms
B)6.02 x 1027 atoms
C)1.43 x 1027 atoms
D)2.53 x 1024 atoms
7
How many moles of C3H8 are present in 451 g C3H8?
A)3.84 mol
B)0.879 mol
C)10.2 mol
D)1.44 mol
8
Calculate the number of moles of hydrogen atoms in 4.75 mol sulfuric acid.
A)2.38 mol
B)4.75 mol
C)9.50 mol
D)33.2 mol
9
Ethanol is C2H5OH. How many atoms of hydrogen are in 92 grams of ethanol?

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/007874637x/514706/figure_10_11_page_340_2008_CMC.jpg','popWin', 'width=500,height=327,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (62.0K)</a>
A)7.2 x 1024 atoms of hydrogen
B)1.2 x 1024 atoms of hydrogen
C)6.0 x 1024 atoms of hydrogen
D)3.0 x 1024 atoms of hydrogen
10
What is the percent composition of carbon dioxide CO2?
A)73% C and 27% O
B)27% C and 73% O
C)33% C and 66% O
D)50% C and 50% O
11
An empirical formula mass is found to be 17 g/mol. The molar mass is found to be 34 g/mol. What is the number of empirical formula units in this molar mass?
A)2 units
B)0.5 unit
C)17 units
D)1 unit
12
A sample of a metal salt contains 36.1 % calcium and 63.9 % chlorine. What is the empirical formula

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/007874637x/514766/fig10_13.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (38.0K)</a>
A)CaCl
B)Ca2Cl2
C)Ca2Cl
D)CaCl2
13
A compound that has a specific number of water molecules bound to the structure is ______________?
A)a hydrate
B)an anhydrate
C)aqueous
D)waterlogged
14
What is the correct chemical formula for iron (III) phosphate tetrahydrate?

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/007874637x/514766/tab10_1.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (21.0K)</a>
A)FePO4 . 8H2O
B)FePO4 . 4H2O
C)4FePO4 . H2O
D)FePO4 . 4(OH)2
15
A sample is 50.7% CaCl2 and 49.3 % H20. How many water molecules are associated with this hydrate?
A)5
B)6
C)8
D)10
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe