Chapter 10 Review “Chemical Quantities”
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Transcript Chapter 10 Review “Chemical Quantities”
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