Chapter 10 Review
“Chemical Quantities”
Honors Chemistry
Chapter 10 Review
 Which
of the following sets of
empirical formula, molar mass, and
molecular formula is correct:
a) CH, 78 g, C13H13, or
b) CH4N, 90 g, C3H12N3?
 What is the empirical formula of a
compound that is 40% sulfur and
60% oxygen by weight?
Chapter 10 Review
 What
SI unit is used to measure the
number of representative particles in
a substance?
 Avogadro’s number of
representative particles is equal to
one ____.
 The molar mass of a certain gas is
49 g. What is the density of the gas
in g/L at STP?
Chapter 10 Review
A
22.4 L sample of which of the
following substances, at STP, would
contain 6.02 x 1023 representative
particles: a) oxygen, or b) gold?
 Which combination of temperature
and pressure correctly describes
standard temperature and pressure,
STP?
Chapter 10 Review
 Which
of the following is NOT true
about atomic mass: a) the atomic
mass is 12 g for magnesium, or
b) the atomic mass is the mass of
one mole of atoms?
 Which of the following elements
exists as a diatomic molecule:
a) lithium, or b) nitrogen?
Chapter 10 Review
Which of the following gas samples
would have the largest number of
representative particles at STP:
a) 12.0 L He, or b) 7.0 L O2?
 The molar volume of any gas at STP
occupies ____.
 What is the molar mass of AuCl3?
 The lowest whole-number ratio of the
elements in a compound is called the
____.

Chapter 10 Review
 Given 1.00 mol of each of the
following gases at STP, which gas
would have the greatest volume:
a) He, or b) SO3?
 What is the number of moles in
500 L of He gas at STP?
 What is the percent composition of
chromium in BaCrO4?
Chapter 10 Review
 How
many atoms are in 0.075
mol of titanium?
 How many molecules are in
2.10 mol CO2?
 How many hydrogen atoms
are in 5 molecules of isopropyl
alcohol, C3H7O?
Chapter 10 Review
 If the density of an unknown gas
“Z” is 4.50 g/L at STP, what is the
molar mass of gas “Z”?
 If 60.2 g of Hg combines
completely with 24.0 g of Br to
form a compound, what is the
percent composition of Hg in the
compound?
Chapter 10 Review
 Which
of the following compounds
have the same empirical formula:
a) C7H14 and C10H20, or
b) C6H12 and C6H14?
 What is the molar mass of
ammonium carbonate, (NH4)2CO3?
 Know the comparisons between an
empirical and molecular formula.
Chapter 10 Review
 What
is the molar mass of chlorine
gas?
 The volume of one mole of a
substance is 22.4 L at STP for all
____.
 Which of the following is NOT an
empirical formula: a) C2N2H8, or
b) C3H8O?
Chapter 10 Review
 How
many moles of tungsten atoms
are in 4.8 x 1025 atoms of tungsten?
 What information is needed to
calculate the percent composition of
a compound?
 What is the density at STP of the
gas sulfur hexafluoride, SF6?
 Know the values that Avogadro’s
number is equal to.
Chapter 10 Review
 How
many moles of silver atoms are
in 1.8 x 1020 atoms of silver?
 Determine the mass in grams of
3.10 x 1023 molecules of F2.
 Find the number of moles of argon
in 607 g of argon.
 Find the mass, in grams, of
1.40 x 1023 molecules of N2.
Chapter 10 Review