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Chemistry 101 Midterm Exam Questions and Answers, Exams of Analytical Chemistry

A set of multiple-choice questions and answers covering various topics in introductory chemistry, including scientific laws, physical and chemical properties, states of matter, atomic structure, chemical formulas and nomenclature, stoichiometry, and chemical reactions. It can be a valuable resource for students preparing for their chemistry 101 midterm exam.

Typology: Exams

2024/2025

Available from 04/13/2025

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Ivytech Chem 101 Midterm Updated QuestionsWith Verified Answers 2025/2026The definition of a scientif-
ic law is
a number of similar obser-
vations generalized into a
brief statement summariz-
ing past observations and
predicting new ones
Which statement about a
hypothesis is TRUE All of the above state-
ments are true.
Which of the following is
an example of a scientific
law
In a chemical reaction,
matter is neither created
nor destroyed.
A sample of wood with a
mass of 3.0 grams was
burned in an open dish.
The ashes weighed 1.2
grams. What happened to
the rest of the wood?
The remaining 1.8 grams
was converted into
gaseous compounds.
Which statement would
NOT be an example of
"quantification"
The water in the swimming
pool feels colder than it
was yesterday.
A popular science demon-
stration is to take several
liquids that will not mix to-
gether and "stack" these
liquids in a tall glass cylin-
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Download Chemistry 101 Midterm Exam Questions and Answers and more Exams Analytical Chemistry in PDF only on Docsity!

Ivytech Chem 101 Midterm Updated Questions With Verified Answers 2025/

The definition of a scientif- ic law is

a number of similar obser- vations generalized into a brief statement summariz- ing past observations and predicting new ones Which statement about a hypothesis is TRUE

All of the above state- ments are true. Which of the following is an example of a scientific law

In a chemical reaction, matter is neither created nor destroyed.

A sample of wood with a mass of 3.0 grams was burned in an open dish. The ashes weighed 1. grams. What happened to the rest of the wood?

The remaining 1.8 grams was converted into gaseous compounds.

Which statement would NOT be an example of "quantification"

The water in the swimming pool feels colder than it was yesterday.

A popular science demon- stration is to take several liquids that will not mix to- gether and "stack" these liquids in a tall glass cylin-

der. Suppose the following three liquids were places in the same tall, narrow glass cylinder:

SUBSTANCE DENSITY

(g/mL) vinegar 1. motor oil 0. corn syrup 1. These liquids would stack in which order?

motor oil on top, vinegar in the middle, corn syrup on the bottom

Suppose a boat engine leaks 938 mL of oil into a lake. The mass of this spilled oil is 823 g. The oil will not mix with the lake water. Which statement is true?

The oil will float because its density of 0.877 g/mL is less than the density of water.

Determine the answer to the following equation with correct number of signifi- cant figures:

The correct number of sig- nificant figures in the num- ber 0.027090 is:

Physical properties are

those that a substance dis- plays without changing its composition

Which type of energy is as- sociated with the burning of gasoline

chemical

Which type of energy is as- sociate with motion

kinetic

Which state of matter has atomic spacing that is close together and indefi- nite shape?

liquid

When methane is burned with oxygen the products are carbon dioxide and water. If you produce 18 grams of water from 8 grams of methane and 32 grams of oxygen, how many grams of carbon

dioxide were produced in the reaction? Which of the following items is a pure substance ice

All of the following can be considered physical prop- erties EXCEPT:

flammability

Which type of energy is as- sociated with position potential

Which of the following statements is FALSE

All of the above state- ments are true

Which state of matter has indefinite shape and is compressible

gas

What is the atomic symbol for silver

Ag

How many neutrons are found in Ne-

What is the mass number of the hydrogen isotope that contains 2 neutrons?

Fluorine is considered which of the following? molecular element

What is the name of Ca(NO3) calcium nitrate

The ionic compound that forms between potassium and oxygen is:

K2O

What is the formula mass for potassium ni- trate, KNO

101.10 amu

What is the correct name of the compound whose formula is N2O4?

dinitrogen tetroxide

What is the name of HNO2? nitrous acid

How many of each type of atom are there in the for- mula Ca3(PO4)2?

Ca = 3, P = 2, O = 8

How many of each type of atom are there in the for- mula (NH4)2 HPO4?

N = 2, H = 9, P = 1, O = 4

How many atoms of lithi- um are in 18.7 g 1.62 x 1024 atoms

How many moles of car- bon are in 3.5 moles of cal- cium carbonate, CaCO3?

3.5 mol

What is the mass percent of chlorine in hydrochloric acid, HCl?

One half of a mole of atoms would contain how many atoms?

3.011 x 10^

What is the mass in grams of 5.40 moles of lithium?

37.5 g

How many molecules of sulfur trioxide, SO3, are in 78.0 grams?

5.87 x 1023 molecules

How many moles of potas- sium are in 156.4 g

4.000 mol

How many atoms are in 5.80 moles of He? 3.49 x 1024 atoms

What is the mass of 1.56 x 1021 atoms of magnesium in grams?

0.0630 g

  1. Na2SO4 (aq) +BaCl (aq) ö BaSO4 (aq) +2 NaCl (aq)
  2. H2SO4 (aq) + NaOH (aq) ö Na2SO4 (aq) + 2H2O (l)

The reaction CH4 (g) + 2O2 (g) ö CO2 (g) +2 H2O (g) is:

all of the above

When water is heated, bubbles form in the water. Is this evidence of a chem- ical reaction? Why?

Np, boiling water is a phys- ical change.

Methane gas (CH4), on complete combustion in air, produces:

1. CO

2. H

3. H2O

1 and 3 only

Which of the following statements about balanc- ing reactions is FALSE?

When coefficients are added the type of com- pound is changed in the chemical reaction. Before a chemical equa- tion can be written, one must know:

The symbols and formulas of all reactants and prod- ucts