Gilroy Assessment
NGSS by Topic
Grades 9-12
ID: 211498
Molecular and Structural Formulas
Directions: Read the question. Fill in the bubble next to the corresponding question number on your answer
sheet.
Sample Question
Sample Item Not Available
Sample Answer Sheet
1.
2.
3.
4.
5.
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
1
What information can you obtain from a ball-and-stick model that you cannot obtain from a
structural formula?
A the number and position of double bonds
B the arrangement of atoms in space
C the relative lengths of the chemical bonds
D the color of the different atoms
2
Based on their names and molecular formulas, which of these compounds most likely has a
fishy smell?
A butyric acid, C4H8O2
B ethyl acetate, C4H8O2
C phenylethylamine, C8H11N
D D. hexyl alcohol, C6H14O
3
What is the molecular formula of the compound shown below?
A C5H8O
B C4H8O
C C5H8O2
D C5H10O
IO Assessment © 2019 IO Education
All content is the private property of the copyright holders.
Molecular and Structural Formulas | ID: 211498
Page 1
Generated: 1/2019
4
What is the molecular formula of the compound shown below?
A C5H8O
B C4H8O
C C5H8O2
D C5H10O
5
What is the formula for an ionic compound composed of Ca and I?
A CaI2
B Ca2I
C CaI
D CaI3
6
What is the chemical formula for cobalt (II) nitrate?
A Co2NO3
B Co(NO3)3
C Co(NO3)2
D Co2(NO3)3
IO Assessment © 2019 IO Education
All content is the private property of the copyright holders.
Molecular and Structural Formulas | ID: 211498
Page 2
Generated: 1/2019
7
What is the chemical formula for manganese (III) oxide?
A Mn2O4
B Mn2O3
C MnO2
D MnO
8
Based on its name and chemical formula, predict the smell of ethyl acetate, C5H10O2.
A sweet
B minty
C fishy
D putrid
9
Based on the molecular formula of the compound, which of these chemical compounds is likely to have a fishy smell?
A C4H8O2
B C8H19N
C C10H14O
D C10H16O
10
Name the ions represented by the following formulas:
+
NH4
11
Write the formulas for the following ions:
Sodium ion
Hydroxide
IO Assessment © 2019 IO Education
All content is the private property of the copyright holders.
Molecular and Structural Formulas | ID: 211498
Page 3
Generated: 1/2019
12
Based on the reading, a molecular formula can be used to predict a compound's
___________.
A color
B density
C smell
D specific heat
13
If the formula for an ionic compound is represented by X3Y2, what is the charge on the X ion?
A 2+
B 2C 3+
D 3-
14
Write the chemical name for the following formulas. Make sure to include the correct Roman
numeral in each name to designate the charge on the cation.
A. TiO2
B. Fe2O3
C. Mn2O7
15
The correct formula for diphosphorus trioxide is P2O4.
T True
F False
16
To smell something I should
A wave my hand gently over the opening of the container toward my nose
B Stick my nose into the container and inhale
C set a piece of paper in the container for at least five minutes and sniff the odor that comes off
D ask a partner
IO Assessment © 2019 IO Education
All content is the private property of the copyright holders.
Molecular and Structural Formulas | ID: 211498
Page 4
Generated: 1/2019
17
What must happen to a solid material before a person is able to smell it?
A Molecules break apart into individual functional groups.
B Molecules melt to the liquid state.
C Molecules vaporize to the gas state.
D Molecules clump together in the air.
18
A small molecular compound has the functional group shown below. What type of smell does
the compound have?
A sweet
B fishy
C camphor
D putrid
19
You can only smell molecules when they are in what phase?
A gas
B liquid
C solid
D aqueous
20
Metals do not smell because
A metal is too big to fit in your nose.
B the atoms in metals are all polar.
C metal atoms stick together and do not travel to your nose.
D metal is composed of ions, not atoms.
IO Assessment © 2019 IO Education
All content is the private property of the copyright holders.
Molecular and Structural Formulas | ID: 211498
Page 5
Generated: 1/2019
21
Look at the two molecules represented below. Predict how each molecule will smell and
explain your reasoning. (5 points each)
IO Assessment © 2019 IO Education
All content is the private property of the copyright holders.
Molecular and Structural Formulas | ID: 211498
Page 6
Generated: 1/2019
22
What do sweet-smelling compounds have in common?
23 Which molecules would you expect to have the same smell?
A 1 and 2
B 2 and 3
C 1 and 3
D 1, 2, and 3
IO Assessment © 2019 IO Education
All content is the private property of the copyright holders.
Molecular and Structural Formulas | ID: 211498
Page 7
Generated: 1/2019
24 Which molecules would you expect to have the same smell?
A 1 and 2
B 2 and 3
C 1 and 3
D 1, 2, and 3
25
What smell would you predict for fenchol, C10H18O?
A sweet
B putrid
C camphor
D minty
IO Assessment © 2019 IO Education
All content is the private property of the copyright holders.
Molecular and Structural Formulas | ID: 211498
Page 8
Generated: 1/2019
26
Which of the following substances will not have a smell
A HF
B H2S
C NH3
D CH4
27
Which of the following substances will have a smell?
A Cu(s)
B N2(g)
C CO2(g)
D C10H14O(l)
IO Assessment © 2019 IO Education
All content is the private property of the copyright holders.
Molecular and Structural Formulas | ID: 211498
Page 9
Generated: 1/2019