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WorksheetsChem B Unit 2 Test Review
Total questions: 24
Worksheet time: 49mins
Name
Class
Date
1.
The best definition for a mole provided below is
a)
The SI unit for the mass of something
b)
The SI unit for the amount of a substance
c)
The SI unit for the volume of something
d)
The SI unit for the area of a substance
2.
The number 6.02 x 1023, which is the number of particles found in a mole.
a)
molar mass
b)
mole
c)
Avogadro's number
d)
hydrate
3.
What is the molar mass of copper?
a)
12 g/mol
b)
63.5 g/mol
c)
58.9 g/mol
d)
40.1 g/mol
4.
What is the molar mass of table salt (NaCl)?
a)
116.9 g/mol
b)
35.5 g/mol
c)
23 g/mol
d)
58.4 g/mol
5.
What is the molar mass of fluorine gas?
a)
19 g/mol
b)
38 g/mol
c)
9 g/mol
d)
18 g/mol
6.
What is the molar mass of B2(CO3)3?
a)
81.6 g/mol
b)
94.8 g/mol
c)
38.8 g/mol
d)
201.6 g/mol
7.
What is the molar mass of CuSO4*7H2O?
a)
185.6 g/mol
b)
2,850.1 g/mol
c)
285.6 g/mol
d)
20,119.6 g/mol
8.
What is the mass of one mole of aluminum?
a)
27 g
b)
13 g
c)
54 g
d)
14 g
9.
How many moles are present in 48 grams of Carbon?
a)
1 mol C
b)
2 mol C
c)
3 mol C
d)
4 mol C
10.
Find the percentage composition of Mg in Mg3(PO4)2.
a)
27.75% Mg
b)
23.57% Mg
c)
48.68% Mg
d)
13.45% Mg
11.
How many moles are in 3.01 x 1022 atoms of magnesium?
a)
0.05 moles
b)
1.81 x 1046 moles
c)
5.00 x 1021 moles
d)
5.00 moles
12.
The mass in grams of one mole of any pure substance.
a)
molecular formula
b)
hydrate
c)
mole
d)
molar mass
13.
What is the percent composition of oxygen in carbon dioxide?
a)
27.3% O
b)
33.3 % O
c)
66.7 % O
d)
72.7% O
14.
The percent by mass of each element in a compound.
a)
empirical formula
b)
mole
c)
percent composition
d)
molar mass
15.
A formula that specifies the actual number of atoms of each element in one molecule of a substance.
a)
empirical formula
b)
molecular formula
c)
mole
d)
molar mass
16.
A formula that shows the smallest whole-number ratio of the elements of a compound.
a)
molecular formula
b)
molar mass
c)
mole
d)
empirical formula
17.
The shape and written out drawing of a compound.
a)
Molecular formula
b)
empirical formula
c)
structural formula
d)
Talbott formula
18.
What is the percent composition of C in C6H14O5?
a)
43.4% C
b)
56.6% C
c)
36.1% C
d)
8.4% C
19.
How much volume does 3 moles of chlorine gas occupy at STP?
a)
250 L
b)
213 L
c)
106.5 L
d)
67.2 L
20.
How many formula units does 5 moles of helium lithium represent?
a)
8.31 x 1024 units He
b)
3.01 x 10-24 units He
c)
3.01 x 1024 units He
d)
8.31 x 10-24 units He
21.
How many grams are there is 1.35 x 1025 atoms of K2SO4?
a)
3,909 g K2SO4
b)
174.1g K2SO4
c)
3.53 x 1021 g K2SO4
d)
423 g K2SO4
22.
Hydrogen gas that occupies 35 L has a mass of what?
a)
1.6 g
b)
2.3 g
c)
3.1 g
d)
5.2 g
23.
What is the empirical formula of glucose? (C6H12O6)
a)
C3H6O3
b)
CH2O
c)
C6H12O6
d)
C0.5H1O0.5
24.
What is the molecular formula for the following structure?
a)
CH
b)
C4H4
c)
C4H10
d)
C2H5
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