Straighterline Chemistry Final Questions and Correct Answers with Verified Solutions

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