WorksheetsChapter 4 - Stoichiometry
Total questions: 28
Worksheet time: 14mins
A 25.0 mL solution of HCl is neutralized with 19.5 mL of 0.115M Sr(OH)₂. What is the concentration of the original HCl solution
0.179
0.154
0.0191
0.0207
To make a s'more snack, it takes 2 marshmallows, 1/3 of chocolate bar, and 1 graham cracker. However, these ingredients are sold in ratios that do not allow you to use up all of the ingredients. Based on the packaging of the ingredients (shown below), what is the limiting reagent?
Marshmallows
Chocolate bars
Graham Crackers
Calculate the grams of AlI₃ from the complete reaction of 18.3 grams of Al according to the following balanced equation:
Al(s) + 3I₂(s) → 2AlI₃(s)
407.7
26.98
277
If 8.00 moles of NH₃ of and 10.00 moles of O₂ react in the following reaction, how many moles of which reactant will be left over?
4 NH₃ (g) + 5 O₂ (g) → 4 NO (g) + 6 H₂O (g)
2.00 mol O₂
2.00 mol NH₃
8.00 mol NO
no moles will be left over of either reactant because both are limiting.
How many liters of a 0.209 M KI solution is needed to completely react with 2.43 g of Cu(NO₃)₂ according to the balanced chemical reaction:
2 Cu(NO₃)₂ + 4 KI--> 2 CuI + I₂ + 4KNO₃
0.124 L KI
0.287 L KI
0.528 L KI
0.391 L KI
When copper is heated with an excess of sulfur, copper(I) sulfide is formed. In a given experiment, 1.50 g of copper was heated with excess sulfur to yield 1.71 g copper(I) sulfide. What is the percent yield?
76%
50%
82%
91%
Write a balanced chemical equation based on the following description: butane gas reacts with oxygen gas to produce carbon monoxide gas and water vapor:
C₄H₁₀(g) + O₂(g) →
18 CO(g) + 100 H₂O(g)
10 CO(g) + 8 H₂O(g)
8 CO(g) + 10 H₂O(g)
6 CO(g) + 8 H₂O(g)
According to the balanced reaction below, calculate the quantity of moles NH₃ gas that form when 4.20 mol of N₂H₄ liquid completely reacts:
3 N₂H₄(l) → 4 NH₃(g) + N₂(g)
5.37 mol NH₃
5.60 mol NH₃
4 mol NH₃
3.65 mol NH₃
What is the mass percentage of C in caffeine, C₈H₁₀N₄O₂? Provide an answer to two decimal places.
49.98%
28%
51%
36%
What is the concentration of lithium ions in 0.375 M Li₂HPO₄?
.800 Li
.705 Li
.750 Li
Determine the milligrams of CO produced when 455 milligrams of C reacts with
SO₂ according to the following reaction:
5 C + 2 SO₂ → CS₂ + 4 CO
849 mg CO
64.06 mg CO
754 mg CO
800 mg CO
If 48.3 g of C₂H₅OH (MM = 46.07 g/mol) are added to a 500.0 mL volumetric flask, and water is added to fill the flask, what is the concentration of C₂H₅OH in the resulting solution?
1.3 M
1.52 M
2.1 M
1.49 M
What is the mass percent of water in Zn(NO₃)₂･6 H₂O? Provide an answer to one decimal place.
29.5%
40%
32%
36.3%
How many grams of NaCl are needed to completely precipitate the Ag+ ions as AgCl from 1.50 L solution of 0.100 M AgNO₃ according to the balanced chemical reaction:
AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)
5.66 g NaCl
2.99 g NaCl
8.77 g NaCl
4.33 g NaCl
Determine the mass in grams of CO₂ that are produced by the complete reaction of 11.65 grams of C₉H₂₀(nonane) according to the following combustion reaction:
C₉H₂₀(l) + 14 O₂(g) → 9 CO₂(g) + 10 H₂O(g)
23.54 g CO₂
16.55 g CO₂
31.28 g CO₂
35.99 g CO₂
Predict the products and balance the following reaction: Ag₂SO₄(aq) + NaCl(aq) →
Ag₂SO₄(aq) + NaCl(aq) → NaSO₄(aq) + AgCl(s)
Ag₂SO₄(aq) + NaCl(aq) → Na₂SO₄(aq) + 2AgCl(aq)
Ag₂SO₄(aq) + 2NaCl(aq) → Na₂SO₄(aq) + 2AgCl(s)
2Ag₂SO₄(aq) + 4NaCl(aq) → Na₂SO₄(aq) + 4AgCl(s)
Which of the following aqueous solutions would NOT form a precipitate when added to a solution of silver nitrate?
NaF
NaCl
NaBr
NaI
Which one of the following represents the net ionic equation for the reaction of Ca(NO₃)₂ with Li₃PO₄?
3 Ca(NO₃)₂ (aq) + 2 Li₃PO₄ (aq) --> Ca(NO₃)₂ (s) + 6 LiNO₃ (aq)
Ca2+ (aq) + PO₄3- (aq) --> Ca₃(PO₄)₂
3 Ca2+ (aq) + 2 PO₄3- (aq) --> Ca₃(PO₄)₂
Li+ (aq) + NO₃- (aq) --> LiNO₃ (s)
What volume (in mL) of water must you add to 25.0 mL of a 0.250 M NaBr solution to produce a 0.0195 M solution? Assume the volumes are additive.
296 mL
300 mL
285 mL
297 mL
If 60.6 g of aspirin (C₉H₈O₄) are produced from 79.8 g of C₇H₆O₃, what is the percent yield from the reaction below? C₇H₆O₃ (s) + C₄H₆O₃ (l) → C₉H₈O₄ (s) + HC₂H₃O₂ (aq).
60%
58%
61%
58.2%
What is the molecular formula of a compound with an empirical formula of CH and a molar mass of 78.1 g/mol?
CH
C₆H₆
C6H6
Which of the following reactions is a double displacement reaction?
HCl (aq) → H₂ (g) + Cl₂ (g)
HCl (aq) + NaOH (aq) → H₂O (l) + NaCl (aq)
Mg (s) + HCl (aq) --> MgCl₂ (aq) + H₂ (g)
Consider the balanced chemical equation: 3 H₂(g) + N₂(g) → 2 NH₃(g) If 46.8 g H₂ and 179.4 g N₂ are mixed to form NH₃, which of the following substances is the limiting reactant?
Nitrogen (N₂)
Hydrogen(H₂)
Ammonia
An aqueous solution of Mg(NO₃)₂ and NaOH generates the solid precipitate Mg(OH)₂. Which of the following would NOT appear in the corresponding net ionic reaction?
Mg2+
NO₃⁻
Mg(OH)₂
OH-
If 25.0 g of NH₃ and 38.0 g of O₂ react in the following reaction, what is the mass in grams of NO that will be formed? 4 NH₃ (g) + 5 O₂ (g) → 4 NO (g) + 6 H₂O (g)
28.5 g
36 g
30 g
What is the molecular formula of a compound that contains only carbon and hydrogen, is 85.6% carbon, and has a molar mass of 70 g/mol?
A) CH₂
B) C₅H₁₀
C) C₅H₅
D) C₄H₂₁
What is the empirical formula of a compound that contains only iron and oxygen and is 22.27% oxygen?What
FeO
Fe2O
What is the empirical formula of acetic acid, HC₂H₃O₂?
A) HCO
B) H₂C₄H₆O₄
C) H₂CO
D) CO₂
