Straighterline Chemistry Final Questions and
Correct Answers with Verified Solutions
New Update 2026
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 - ✔✔ANSWER✔✔-a. Law
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 - ✔✔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 - ✔✔ANSWER✔✔-c. Homogeneous mixture
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 - ✔✔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 - ✔✔ANSWER✔✔-e. Atomic mass unit
,How many neutrons are there in an atom of lead whose mass number is 208?
Select one:
a. 82
b. 126
c. 208
d. 290
e. none of them - ✔✔ANSWER✔✔-b. 126
Which of these elements is chemically similar to magnesium?
Select one:
a. Sulfur
b. Calcium
c. Iron
d. Nickel
e. Potassium - ✔✔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. - ✔✔ANSWER✔✔-b. allotropes of carbon.
, 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. - ✔✔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 - ✔✔ANSWER✔✔-d. Na2S
Which one of the following formulas of ionic compounds is the least likely to
be correct?
Select one:
a. NH4Cl
b. Ba(OH)2
c. Na2SO4
d. Ca2NO3
e. Cu(CN)2 - ✔✔ANSWER✔✔-d. Ca2NO3
Correct Answers with Verified Solutions
New Update 2026
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 - ✔✔ANSWER✔✔-a. Law
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 - ✔✔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 - ✔✔ANSWER✔✔-c. Homogeneous mixture
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 - ✔✔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 - ✔✔ANSWER✔✔-e. Atomic mass unit
,How many neutrons are there in an atom of lead whose mass number is 208?
Select one:
a. 82
b. 126
c. 208
d. 290
e. none of them - ✔✔ANSWER✔✔-b. 126
Which of these elements is chemically similar to magnesium?
Select one:
a. Sulfur
b. Calcium
c. Iron
d. Nickel
e. Potassium - ✔✔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. - ✔✔ANSWER✔✔-b. allotropes of carbon.
, 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. - ✔✔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 - ✔✔ANSWER✔✔-d. Na2S
Which one of the following formulas of ionic compounds is the least likely to
be correct?
Select one:
a. NH4Cl
b. Ba(OH)2
c. Na2SO4
d. Ca2NO3
e. Cu(CN)2 - ✔✔ANSWER✔✔-d. Ca2NO3
