Straighterline Chemistry Final Exam | 100% Verified Questions and Answers | A+ Solution

STRAIGHTERLINE CHEMISTRY FINAL EXAM 2024-2025
QUESTIONS AND ANSWERS 100 % PASS SOLUTION A+ GRADE
Which of these elements is chemically similar to magnesium
Select one:
a. Sulfur
b. Calcium
c. Iron
d. Nickel
e. Potassium - ANSWER--b. Calcium




What is the vapor pressure above a beaker containing a solution of NaCl that is made up of
250ml of water and 12g of NaCl?



a. 10.3 mmHg

b. 23.4 mmHg

c. 35.8 mmHg
d. 63.2 mmHg - ANSWER--b. 23.4 mmHg



A smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0 millimeters
(depth). What is the volume of the smart phone in cubic centimeters? (1 in = 2.54 cm) Select
one:
a. 58 cm3
b. 1.7 x 105 cm3
c. 90 cm3
3.4 cm3 d.

e. 34 cm3 - ANSWER--a. 58 cm3



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



Which one of the following equations correctly represents the process relating to the ionization
energy of X?

Select one:
a. X(s) → X+(g) + e-
b. X2(g) → X+(g) + X-(g)
c. X(g) + e- → X-(g)
d. X-(g) → X(g) + e-
e. X(g) → X+(g) + e- - ANSWER--e. X(g) → X+(g) + e-

,Consider the element with the electron configuration [Kr]5s24d105p5. This element is
Select one:

a. a halogen.

b. a transition metal. c. an alkali metal.

d. an actinide element.

e. a noble gas. - ANSWER--a. a halogen.



Consider the element with the electron configuration [Kr]5s24d7. This element is Select one:

a. a halogen.

b. a transition metal.

c. a nonmetal.

d. an actinide element.

e. a noble gas. - ANSWER--b. a transition metal.



How does atomic radius change as you move across the periodic table? Select one:

a. Atomic radius decreases moving from left to right across a period and increases from
top to bottom.

b. Atomic radius increases moving left to right across a period and decreases from top to
bottom.

c. Smaller nuclear charge lowers energy; more electrons in an orbital lowers energy.
d. Atomic radius increases diagonally across the periodic table.

e. None of the answers is correct. - ANSWER--a. Atomic radius decreases moving from left
to right across a period and increases from top to bottom.



Which of these choices is the electron configuration of the iron(III) ion? Select one:

a. [Ar]3d5

b. [Ar]4s13d5 c. [Ar]4s23d3 d. [Ar]3d6

e. [Ar]4s23d9 - ANSWER--a. [Ar]3d5

, An element with the general electron configuration for its outermost electrons of ns2np1
would be in which element group?

Select one:
a. 2A
b. 3A
c. 4A
D. 5A
e. 8A - ANSWER--b. 3A




The effective nuclear charge for an atom is less than the actual nuclear charge due to
Select one:
a. shielding.

b. penetration.

c. paramagnetism.

d. electron-pair repulsion.

e. relativity. - ANSWER--a. shielding.



Which pair of ions exhibits the greatest attractive force between them? Select one:
a. Na+ and Cl-
b. Ca2+ and Cl-
c. Na+ and S2-
d. Al3+ and Mg2+
e. Mg2+ and O2- - ANSWER--e. Mg2+ and O2-




Which of the following is a basic oxide?