STRAIGHTERLINE CHEMISTRY FINAL EXAM
PRACTICE QUESTIONS AND CORRECT ANSWERS
NEW MODIFIED EXAM CURRENTLY TESTED AND
APPROVED 2026 LATEST UPGRADE
Given that 1 inch = 2.54 cm, 1.00 cm3 is equal to
Select one:
a. 16.4 in3
b. 6.45 in3
c. 0.394 in3
d. 0.155 in3
e. 0.0610 in3 --CORRECT ANSWER--e. 0.0610 in3
What terms defines a mass which is exactly equal to 1/12 the mass of one carbon-12 atom?
Select one:
a. Isotope number
b. Mass number
c. Mass-to-charge ratio
d. Atomic number
e. Atomic mass unit --CORRECT ANSWER--e. Atomic mass unit
How many neutrons are there in an atom of lead whose mass number is 208?
Page 1 of 78
,Select one:
a. 82
b. 126
c. 208
d. 290
e. none of them --CORRECT ANSWER--b. 126
Which of these elements is chemically similar to magnesium?
Select one:
a. Sulfur
b. Calcium
c. Iron
d. Nickel
e. Potassium --CORRECT ANSWER--b. Calcium
C(graphite) and C(diamond) are examples of:
Select one:
a. isotopes of carbon.
b. allotropes of carbon.
c. the law of definite proportions.
d. different carbon ions. --CORRECT ANSWER--b. allotropes of carbon.
Page 2 of 78
,The 80Br- ion has
Select one:
a. 45 protons, 35 neutrons, 45 electrons.
b. 35 protons, 45 neutrons, 34 electrons.
c. 35 protons, 45 neutrons, 36 electrons.
d. 45 protons, 35 neutrons, 46 electrons.
e. 35 protons, 45 neutrons, 46 electrons. --CORRECT ANSWER--e. 35 protons, 45 neutrons,
46 electrons.
The formula for sodium sulfide is
Select one:
a. NaS
b. K2S
c. NaS2
d. Na2S
e. SeS --CORRECT ANSWER--d. Na2S
What is the term used for findings that are summarized based on a pattern or trend?
a. Law
b. Hypothesis
c. Theory
d. Phenomena
e. Prediction --CORRECT ANSWER--a. Law
Page 3 of 78
, Which of the following is a tentative explanation for a set of observations?
Select one:
a. Law
b. Hypothesis
c. Theory
d. Phenomena
e. Prediction --CORRECT ANSWER--b. Hypothesis
If a liquid contains 60% sugar and 40% water throughout its composition then what is it
called?
Select one:
a. Solute
b. Compound
c. Homogeneous mixture
d. Heterogeneous mixture
e. Solvent --CORRECT ANSWER--c. Homogeneous mixture
Which of the following does not have a uniform composition throughout?
Select one:
a. Element
b. Compound
c. Homogeneous mixture
d. Heterogeneous mixture
e. Solvent --CORRECT ANSWER--d. Heterogeneous mixture
Page 4 of 78
PRACTICE QUESTIONS AND CORRECT ANSWERS
NEW MODIFIED EXAM CURRENTLY TESTED AND
APPROVED 2026 LATEST UPGRADE
Given that 1 inch = 2.54 cm, 1.00 cm3 is equal to
Select one:
a. 16.4 in3
b. 6.45 in3
c. 0.394 in3
d. 0.155 in3
e. 0.0610 in3 --CORRECT ANSWER--e. 0.0610 in3
What terms defines a mass which is exactly equal to 1/12 the mass of one carbon-12 atom?
Select one:
a. Isotope number
b. Mass number
c. Mass-to-charge ratio
d. Atomic number
e. Atomic mass unit --CORRECT ANSWER--e. Atomic mass unit
How many neutrons are there in an atom of lead whose mass number is 208?
Page 1 of 78
,Select one:
a. 82
b. 126
c. 208
d. 290
e. none of them --CORRECT ANSWER--b. 126
Which of these elements is chemically similar to magnesium?
Select one:
a. Sulfur
b. Calcium
c. Iron
d. Nickel
e. Potassium --CORRECT ANSWER--b. Calcium
C(graphite) and C(diamond) are examples of:
Select one:
a. isotopes of carbon.
b. allotropes of carbon.
c. the law of definite proportions.
d. different carbon ions. --CORRECT ANSWER--b. allotropes of carbon.
Page 2 of 78
,The 80Br- ion has
Select one:
a. 45 protons, 35 neutrons, 45 electrons.
b. 35 protons, 45 neutrons, 34 electrons.
c. 35 protons, 45 neutrons, 36 electrons.
d. 45 protons, 35 neutrons, 46 electrons.
e. 35 protons, 45 neutrons, 46 electrons. --CORRECT ANSWER--e. 35 protons, 45 neutrons,
46 electrons.
The formula for sodium sulfide is
Select one:
a. NaS
b. K2S
c. NaS2
d. Na2S
e. SeS --CORRECT ANSWER--d. Na2S
What is the term used for findings that are summarized based on a pattern or trend?
a. Law
b. Hypothesis
c. Theory
d. Phenomena
e. Prediction --CORRECT ANSWER--a. Law
Page 3 of 78
, Which of the following is a tentative explanation for a set of observations?
Select one:
a. Law
b. Hypothesis
c. Theory
d. Phenomena
e. Prediction --CORRECT ANSWER--b. Hypothesis
If a liquid contains 60% sugar and 40% water throughout its composition then what is it
called?
Select one:
a. Solute
b. Compound
c. Homogeneous mixture
d. Heterogeneous mixture
e. Solvent --CORRECT ANSWER--c. Homogeneous mixture
Which of the following does not have a uniform composition throughout?
Select one:
a. Element
b. Compound
c. Homogeneous mixture
d. Heterogeneous mixture
e. Solvent --CORRECT ANSWER--d. Heterogeneous mixture
Page 4 of 78
