CHEM 101 Ivy Tech Midterm Questions and
Answers (2026) | Question Bank | Verified
Solutions | A+
• A fictional element has two isotopes, each making up 50% of the
population. Isotope 1 has a mass of 80.0 amu, Isotope 2 has a mass of
85.0 amu. Calculate the atomic mass of the fictional element. -✓✓82.5
amu
• Silicon has three naturally occurring isotopes: Si-28 with mass 27.9769
amu and a natural abundance of 92.21 %, Si-29 with mass 28.9765 amu
and a natural abundance of 4.69 %, and Si-30 with mass 29.9737 amu and
a natural abundance of 3.10 %. Calculate the atomic mass of silicon.
Express your answer using four significant figures. -✓✓Atomic Mass =
28.09
amu
• A good definition of chemistry is: -✓✓The science that seeks to
understand what matter does by studying what atoms and molecules do.
• How is chemistry connected to everyday life? How is chemistry relevant
outside the chemistry laboratory? -✓✓Knowing some chemistry can help
you make day-to-day decisions that affect your life. All matter is made of
chemicals. Many of the changes you observe in the world around you are
caused by chemical reactions. Chemistry is not confined to a laboratory.
• Which of the following is an example of a scientific law?
A) In a chemical reaction, matter is neither created nor destroyed.
B) All matter is composed of small, indestructible particles called atoms.
C) When a can of soda pop is opened, a fizzing sound is heard.
D) Flammable objects contain phlogiston.
E) none of the above -✓✓A) In a chemical reaction, matter is neither
created nor destroyed.
• The most important component when reporting a numerical scientific
result is the ______. -✓✓Unit
, • The decimal value 0.001 is equal to which exponential? -✓✓10^3
• In the number 48.93, which digit is estimated? -✓✓3
• There are exactly 2.54 centimeters in 1 inch. When using this conversion
factor, how many significant figures are you limited to? -✓✓infinite number
of significant figures
• When rounding the number 2.348615 to 5 significant figures, what is the
correct value? -✓✓2.3486
• How many significant figures should be reported in the answer to the
following calculation?(7.02102) + (1001.6) = -✓✓
• How many significant figures should be reported in the answer to the
following calculation?(8.50) × (29.0) × (1.0947) = -✓✓3
• How many significant digits should be reported in the answer to the
following calculation? (4.3 - 3.7) × 12.3 = -✓✓1
• The correct prefix for the multiplier 1,000,000 is: -✓✓Mega
• The correct prefix for the multiplier 1,000 is: -✓✓kilo
• What is the base SI unit for length? -✓✓meter
• 5.95 kg to grams. (three significant figures) -✓✓5.95 x 10^3 or 5950
• How many inches are in 25.8 cm? -✓✓10.2 in
• Honda produces a hybrid electric car called the Honda Insight. The Insight
has both a gasoline-powered engine and an electric motor and has an EPA
gas mileage rating of 55 mi per gallon on the highway. 1gal=3.785L,
1km=0.6214mi. What is the Insight's rating in kilometers per liter?
Express your answer in kilometers per liter to two significant figures. -
✓✓Rating =
23
Answers (2026) | Question Bank | Verified
Solutions | A+
• A fictional element has two isotopes, each making up 50% of the
population. Isotope 1 has a mass of 80.0 amu, Isotope 2 has a mass of
85.0 amu. Calculate the atomic mass of the fictional element. -✓✓82.5
amu
• Silicon has three naturally occurring isotopes: Si-28 with mass 27.9769
amu and a natural abundance of 92.21 %, Si-29 with mass 28.9765 amu
and a natural abundance of 4.69 %, and Si-30 with mass 29.9737 amu and
a natural abundance of 3.10 %. Calculate the atomic mass of silicon.
Express your answer using four significant figures. -✓✓Atomic Mass =
28.09
amu
• A good definition of chemistry is: -✓✓The science that seeks to
understand what matter does by studying what atoms and molecules do.
• How is chemistry connected to everyday life? How is chemistry relevant
outside the chemistry laboratory? -✓✓Knowing some chemistry can help
you make day-to-day decisions that affect your life. All matter is made of
chemicals. Many of the changes you observe in the world around you are
caused by chemical reactions. Chemistry is not confined to a laboratory.
• Which of the following is an example of a scientific law?
A) In a chemical reaction, matter is neither created nor destroyed.
B) All matter is composed of small, indestructible particles called atoms.
C) When a can of soda pop is opened, a fizzing sound is heard.
D) Flammable objects contain phlogiston.
E) none of the above -✓✓A) In a chemical reaction, matter is neither
created nor destroyed.
• The most important component when reporting a numerical scientific
result is the ______. -✓✓Unit
, • The decimal value 0.001 is equal to which exponential? -✓✓10^3
• In the number 48.93, which digit is estimated? -✓✓3
• There are exactly 2.54 centimeters in 1 inch. When using this conversion
factor, how many significant figures are you limited to? -✓✓infinite number
of significant figures
• When rounding the number 2.348615 to 5 significant figures, what is the
correct value? -✓✓2.3486
• How many significant figures should be reported in the answer to the
following calculation?(7.02102) + (1001.6) = -✓✓
• How many significant figures should be reported in the answer to the
following calculation?(8.50) × (29.0) × (1.0947) = -✓✓3
• How many significant digits should be reported in the answer to the
following calculation? (4.3 - 3.7) × 12.3 = -✓✓1
• The correct prefix for the multiplier 1,000,000 is: -✓✓Mega
• The correct prefix for the multiplier 1,000 is: -✓✓kilo
• What is the base SI unit for length? -✓✓meter
• 5.95 kg to grams. (three significant figures) -✓✓5.95 x 10^3 or 5950
• How many inches are in 25.8 cm? -✓✓10.2 in
• Honda produces a hybrid electric car called the Honda Insight. The Insight
has both a gasoline-powered engine and an electric motor and has an EPA
gas mileage rating of 55 mi per gallon on the highway. 1gal=3.785L,
1km=0.6214mi. What is the Insight's rating in kilometers per liter?
Express your answer in kilometers per liter to two significant figures. -
✓✓Rating =
23
