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Chapter 10 Test
By Joseph Morsaw
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Last updated over 3 years ago
19 questions
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Question 1
1.
All of the following are equal to Avogadro's number EXCEPT ____.
the number of atoms of gold in 1 mol Au
the number of formula units of sodium fluoride in 1 mol NaF
the number of molecules in 1 mol of Nitrogen gas
the number of grams of bromine in 1 mol Br
Question 2
2.
The lowest whole-number ratio of the elements in a compound is called the ____.
Question 3
3.
1 mole CaClâ‚‚ = 6.02 x10
23
______
ions
formula units
atoms
molecules
Question 4
4.
1 mole Nâ‚‚ = 6.02 x10
23
______
ions
atoms
molecules
formula units
Question 5
5.
1 mole Cu = 6.02 x10
23
______
formula units
ions
atoms
molecules
Question 6
6.
Law of conservation of mass states...
A list of elements organized according to the ease with which the elements undergo certain chemical reactions.
A starting material in a chemical reaction. On the left side of a chemical equation.
the percent by mass of each element in a compound
mass is neither created nor destroyed
Question 7
7.
Molar Mass is
The mass of 1 mole of any substance. Must use the periodic chart to obtain this value.
A chemical reaction that breaks down compounds into simpler products.
Burning. Oxygen gas is one of the reactants and water is one of the products.
number of representative particles in a mole, 6.02 X 10
23
Question 8
8.
What does avogadro's number tell us?
number of moles
number of grams
number of protons
number of particles
Question 9
9.
What information might be most useful for me to find molar mass?
number of protons
atomic mass
number of electrons
atomic number
Question 10
10.
What is Avogadro's number?
336
6.02*10
23
1,796
30
Question 11
11.
Avogadro's number of representative particles is equal to one ____.
kelvin
gram
mole
kilogram
Question 12
12.
What is the molar mass of methane(CH
4
)?
4.032 g/mol
16.043 g/mol
12.011 g/mol
1.008 g/mol
Question 13
13.
Given 6.809 grams of N
2
O
5
how many moles are in the sample?
visibility
View drawing
Question 14
14.
Given 81.20 grams of CaF
2
how many formula units in the sample?
visibility
View drawing
Question 15
15.
Given 5.012x10
24
atoms of silicon, how many grams of silicon are in the sample?
visibility
View drawing
Question 16
16.
The molecular formula for ethyl alcohol is C
2
H
5
OH, what is the percent composition of hydrogen in ethyl alcohol?
visibility
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Question 17
17.
What is the molar mass of acetic acid: HCH
3
COOH?
visibility
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Question 18
18.
In CaBr
2
, what is the percent composition of bromine in the compound?
visibility
View drawing
Question 19
19.
Match the corresponding item with the correct category label.
C
2
H
5
OH
C
NH
3
Sn
Li
2
O
Al
2
O
3
Ag
CaBr
2
FeI
2
atoms
molecules
formula units