TITLE: EMILLYCHARLOTTE 2024/2025 ACADEMIC PERIOD
OWNER: EMILLYCHARLOTTE
COPYRIGHT STATEMENT: ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISHED: SEPTEMBER 2024
ACS EXAM (2024 version) Practice
Questions and Answers
A 20.0 g sample of mercury(II) oxide (HgO, M = 216.6)
is heated strongly, causing it to decompose to metallic Hg and O2 gas. What volume of
O2 gas is produced
(measured at STP)?
(A) 1.03 L
(B) 2.07 L
(C) 4.14 L
(D) 14.0 L - ✔️✔️Correct-A
When 30.0 mL of 0.10 M AgNO3 is added to 30.0 mL of
0.10 M NaCl, aqueous NaNO3 and solid AgCl are
formed. How much solid AgCl is produced?
(A) 0.0030 mol
(B) 0.0060 mol
(C) 0.030 mol
(D) 0.060 mol - ✔️✔️Correct-A
How much Sr(OH)2 • 8 H2O (M = 265.76) is needed to
1/25
,TITLE: EMILLYCHARLOTTE 2024/2025 ACADEMIC PERIOD
OWNER: EMILLYCHARLOTTE
COPYRIGHT STATEMENT: ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISHED: SEPTEMBER 2024
prepare 250.0 mL of solution in which [OH-] = 0.100 M?
(A) 3.32 g
(B) 6.64 g
(C) 9.97 g
(D) 13.3 g - ✔️✔️Correct-A
A 10.00 g sample of a compound containing only carbon, hydrogen, and oxygen forms
23.98 g CO2 and 4.91 g H2O upon complete combustion. What is the empirical formula
of the compound?
(A) C2HO
(B) C3H3O
(C) C6H3O2
(D) C6H6O - ✔️✔️Correct-B
Which of the following is a nonelectrolyte in aqueous
solution?
(A) H2SO4
(B) NaC2H3O2
(C) K2CO3
(D) CH2O - ✔️✔️Correct-D
2/25
, TITLE: EMILLYCHARLOTTE 2024/2025 ACADEMIC PERIOD
OWNER: EMILLYCHARLOTTE
COPYRIGHT STATEMENT: ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISHED: SEPTEMBER 2024
An aqueous solution of potassium sulfate (K2SO4) has a freezing point of -2.24 ºC.
What is its molality?
(Kf = 1.86 ºC•m-1)
(A) 0.401 m
(B) 0.602 m
(C) 1.20 m
(D) 4.17 m - ✔️✔️Correct-A
Dissolution of which salt in water results in a decrease in the temperature of the
solution?
A) KHSO4
(B) NaOH
(C) AlCl3
(D) NH4NO3 - ✔️✔️Correct-D
What is observed when equal volumes of 0.1 M aqueous HCl and 0.01 M aqueous
Na2SO3 are mixed?
(A) Colorless solution and a white precipitate
(B) Colored solution and a white precipitate
(C) Colorless solution and a colored precipitate
3/25
OWNER: EMILLYCHARLOTTE
COPYRIGHT STATEMENT: ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISHED: SEPTEMBER 2024
ACS EXAM (2024 version) Practice
Questions and Answers
A 20.0 g sample of mercury(II) oxide (HgO, M = 216.6)
is heated strongly, causing it to decompose to metallic Hg and O2 gas. What volume of
O2 gas is produced
(measured at STP)?
(A) 1.03 L
(B) 2.07 L
(C) 4.14 L
(D) 14.0 L - ✔️✔️Correct-A
When 30.0 mL of 0.10 M AgNO3 is added to 30.0 mL of
0.10 M NaCl, aqueous NaNO3 and solid AgCl are
formed. How much solid AgCl is produced?
(A) 0.0030 mol
(B) 0.0060 mol
(C) 0.030 mol
(D) 0.060 mol - ✔️✔️Correct-A
How much Sr(OH)2 • 8 H2O (M = 265.76) is needed to
1/25
,TITLE: EMILLYCHARLOTTE 2024/2025 ACADEMIC PERIOD
OWNER: EMILLYCHARLOTTE
COPYRIGHT STATEMENT: ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISHED: SEPTEMBER 2024
prepare 250.0 mL of solution in which [OH-] = 0.100 M?
(A) 3.32 g
(B) 6.64 g
(C) 9.97 g
(D) 13.3 g - ✔️✔️Correct-A
A 10.00 g sample of a compound containing only carbon, hydrogen, and oxygen forms
23.98 g CO2 and 4.91 g H2O upon complete combustion. What is the empirical formula
of the compound?
(A) C2HO
(B) C3H3O
(C) C6H3O2
(D) C6H6O - ✔️✔️Correct-B
Which of the following is a nonelectrolyte in aqueous
solution?
(A) H2SO4
(B) NaC2H3O2
(C) K2CO3
(D) CH2O - ✔️✔️Correct-D
2/25
, TITLE: EMILLYCHARLOTTE 2024/2025 ACADEMIC PERIOD
OWNER: EMILLYCHARLOTTE
COPYRIGHT STATEMENT: ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISHED: SEPTEMBER 2024
An aqueous solution of potassium sulfate (K2SO4) has a freezing point of -2.24 ºC.
What is its molality?
(Kf = 1.86 ºC•m-1)
(A) 0.401 m
(B) 0.602 m
(C) 1.20 m
(D) 4.17 m - ✔️✔️Correct-A
Dissolution of which salt in water results in a decrease in the temperature of the
solution?
A) KHSO4
(B) NaOH
(C) AlCl3
(D) NH4NO3 - ✔️✔️Correct-D
What is observed when equal volumes of 0.1 M aqueous HCl and 0.01 M aqueous
Na2SO3 are mixed?
(A) Colorless solution and a white precipitate
(B) Colored solution and a white precipitate
(C) Colorless solution and a colored precipitate
3/25
