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Unit 4.2 Review
Unit 4.2 Review
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Answers
1
What is the bond angle for this molecule?
<90
109.5
120
<109.5
2
How many grams of NH
4
HCO
3
are equivalent to 2.8 moles of NH
4
HCO
3
?
76.2 g
221.2 g
81.8 g
28.2 g
3
How many valence electrons does the element Helium have?
2
1
18
8
4
Is this molecular polar?
it is nonpolar
it is polar
it is a dipole
it has a zero dipole moment
5
Is this Molecule Polar or Non-Polar
Polar
Non-Polar
6
What electron geometry for this molecule?
tetrahedral
trigonal planar
trigonal pyramidal
bent
7
What is the shape of this molecule?
trigonal planar
bent
tetrahedral
trigonal pyramidal
8
The bond between the Silicon and Sulfur in SiS
2
is a(n)
Quadruple
Single
Double
Triple
9
What is the geometry of this molecule?
pyramid
square planar
triangular planar
tetrahedron
10
How many grams of iron are contained in 2.5 moles of iron?
140 grams
56 grams
138 grams
70 grams
11
What is the geometry of this molecule?
tetrahedron
see-saw
triangular planar
triangular pyramid
12
Which of these is used to estimate the polarity besides shape?
Electronegativity
Atomic mass
Charge
Atomic number
13
What do the dots represent in a Lewis Dot Structure?
Lone Pairs
Excited State Electrons
Eyes
Bonding Electrons
14
What is the geometry of this molecule?
pyramid
bent
triangular planar
linear
15
How many moles of fluorine is in 38 grams of fluorine?
19 moles
2 moles
1 mole
6.022 x 10-23 moles
16
What do the lines represent in a Chemical structure?
Covalent Bonds
Roman Numeral
Ionic Bonds
Lone Pairs
17
How many moles or nitrogen contain 75 g of nitrogen?
10.50 moles
1.42 mole
5.36 moles
8.91 moles
18
How many grams does 18 moles of water weigh?
324 g
32.4 g
1 g
36 g
19
Which of the following formulas represents a molecule with covalent bonds?
AlCl3
KCl
MgCl2
CCl4
20
How many moles are in 98.5 grams of gold?
1.5 moles
0.5 moles
2 moles
5 moles
21
How many grams are in 2.5 moles of oxygen?
3.2 grams
20 grams
40 grams
6.4 grams
22
What is the Molecular geometry of H
2
O?
trigonal pyramidal
linear
tetrahedral
bent
23
What is the molar mass of Cu(MnO
4
)
2
?
366 g/mol
141 g/mol
302 g/mol
203 g/mol
24
What is the shape of this molecule?
Bent
tetrahedral
trigonal pyramid
trigonal planar
25
1 mole of any substance equals ___.
Avogadro's number
6.02x1025 particles
6.02x1023 particles
Avocado's number
26
What is the geometry of this molecule?
linear
triangular bipyramidal
pyramid
bent
27
How many grams would 0.25 mol of Au
2
(SO
4
)
3
weigh?
682 g
170.5 g
2728 g
682.25 g
28
What is the geometry of this molecule?
triangular planar
tetrahedron
T-shape
pyramid
29
A ___________ bond is formed from two atoms sharing electrons?
Covalent
Metal
Ionic
30
How many grams are in 1 mole of Zinc?
31 grams
30 grams
66 grams
65 grams
31
How many moles of sodium are present in 11.5 grams of sodium?
2 moles
0.5 mole
1 mole
1.5 moles
32
What shape does this molecule have?
tetrahedral
bent
trigonal planar
trigonal pyramidal
