Stoichiometry ‹ 97
- Which of the following is the correct net ionic
equation for the reaction of nitrous acid, HNO 2 ,
with sodium hydroxide, NaOH?
(A) HNO 2 + OH- → NO 2 - + H 2 O
(B) HNO 2 + Na+ → NaNO 2 + H+
(C) HNO 2 + NaOH → NaNO 2 + H 2 O
(D) H+ + OH- → H 2 O(l) - 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
1.0 mole of KMnO 4 , 5.0 moles of H 2 C 2 O 4 , and
3.0 moles of H 2 SO 4 are mixed?
(A) 4.0 moles
(B) 5.0 moles
(C) 2.0 moles
(D) 1.0 mole
- When the following equation is balanced, it is
found that 1.00 mole of C 8 H 18 reacts with how
many moles of O 2?
C 8 H 18 (g) + O 2 (g) → CO 2 (g) + H 2 O(g)
(A) 12.5 moles
(B) 10.0 moles
(C) 25.0 moles
(D) 37.5 moles- Ca(s) + 2 H 2 O(l) → Ca(OH) 2 (aq) + H 2 (g)
Calcium reacts with water according to the
above reaction. What volume of hydrogen gas,
at standard temperature and pressure, is pro-
duced from 0.200 mole of calcium?
(A) 5.60 L
(B) 4.48 L
(C) 3.36 L
(D) 1.12 L
- 2 CrO 42 - (aq) + 3 SnO 22 - (aq) + H 2 O(l) →
2 CrO 2 - (aq) + 3 SnO 32 - (aq) + 2 OH-(aq)
How many moles of OH- form when 50.0 mL
of 0.100 M CrO 42 - is added to a flask containing
50.0 mL of 0.100 M SnO 22 -?
(A) 0.100 mole
(B) 6.66 × 10 -^3 mole
(C) 3.33 × 10 -^3 mole
(D) 5.00 × 10 -^3 mole - A solution containing 0.20 mole of KBr and
0.20 mole of MgBr 2 in 2.0 L of water is pro-
vided. How many moles of Pb(NO 3 ) 2 must be
added to precipitate all the bromide as insoluble
PbBr 2?
(A) 0.10 mole
(B) 0.50 mole
(C) 0.60 mole
(D) 0.30 mole - Cycloalkanes are hydrocarbons with the general
formula CnH 2 n, where n ≥ 3. If a 0.420-g sample
of any alkene is combusted in excess oxygen,
how many moles of water will form?
(A) 0.040 mole
(B) 0.600 mole
(C) 0.020 mole
(D) 0.400 mole - For which of the following substances is the for-
mula mass the same for both the empirical and
molecular formulas?
(A) H 2 C 2 O 4
(B) C 6 H 12 O 6
(C) CO 2
(D) H 2 O 2