Take a Diagnostic Exam ‹ 19
Chapter 7
- 14 H+(aq) + 6 Fe^2 +(aq) + Cr 2 O 72 - (aq) →
2 Cr^3 +(aq) + 6 Fe^3 +(aq) + 7 H 2 O(l)
The above reaction is used in the titration of an
iron solution. What is the concentration of the
iron solution if it took 45.20 mL of 0.1000 M
Cr 2 O 72 - solution to titrate 75.00 mL of an acidi-
fied iron solution?
(A) 0.1000 M
(B) 0.4520 M
(C) 0.3616 M
(D) 0.7232 M
- Manganese, Mn, forms a number of oxides. A
particular oxide is 49.5% by mass Mn. What is
the simplest formula for this oxide?
(A) MnO
(B) Mn 2 O 3
(C) Mn 2 O 7
(D) MnO 2 - 2 KMnO 4 (aq) + 5 H 2 C 2 O 4 (aq) + 3 H 2 SO 4 (aq) →
K 2 SO 4 (aq) + 2 MnSO 4 (aq) + 10 CO 2 (g) +
8 H 2 O(l)
How many moles of MnSO 4 are produced when
2.0 mol of KMnO 4 , 2.5 mol of H 2 C 2 O 4 , and
3.0 mol of H 2 SO 4 are mixed?
(A) 1.0 mol
(B) 3.5 mol
(C) 2.0 mol
(D) 2.5 mol
- KClO 3 → KCl + ____ O 2
After the above equation is balanced, how many
moles of O 2 can be produced from 1.0 mol of
KClO 3?
(A) 1.5 mol
(B) 3.0 mol
(C) 1.0 mol
(D) 3.0 mol
Chapter 8
- Ba(s) + 2 H 2 O(l) → Ba(OH) 2 (aq) + H 2 (g)
Barium reacts with water according to the above
reaction. What volume of hydrogen gas, at stan-
dard temperature and pressure, is produced from
0.400 mol of barium?
(A) 8.96 L
(B) 5.60 L
(C) 4.48 L
(D) 3.36 L - A sample of chlorine gas is placed in a container
at constant pressure. The sample is heated until
the absolute temperature is doubled. This will
also double which of the following?
(A) potential energy
(B) moles
(C) density
(D) volume - A balloon contains 2.0 g of hydrogen gas. A
second balloon contains 4.0 g of helium gas.
Both balloons are at the same temperature and
pressure. Which of the following statements is
true?
(A) The number of hydrogen molecules is less
than the number of helium atoms in each
balloon.
(B) The density of the helium in its balloon is
less than the density of the hydrogen in its
balloon.
(C) The volume of the hydrogen balloon is less
than that of the helium balloon.
(D) The average kinetic energy of the molecules/
atoms in each balloon is the same. - The volume and pressure of a real gas are NOT
the same as those calculated from the ideal gas
equation, because the ideal gas equation does
NOT take into account:
(A) the volume of the molecules and the attraction
between the molecules.
(B) the volume of the molecules and the mass of
the molecules.
(C) the attraction between the molecules and the
mass of the molecules.
(D) the volume of the molecules and variations
in the absolute temperature.