Home > Chemistry > Quizzes > Basic Chemistry Practice Test: Stoichiometry & Calculations with Equations
Basic Chemistry Practice Test: Stoichiometry & Calculations with Equations
Fast practice, instant feedback. Timer auto-submits when time’s up.
Avg score: 0% • Most missed: “When the following equation is balanced, the coefficient of HCl is __________. C…”
Basic Chemistry Practice Test: Stoichiometry & Calculations with Equations
Time left 00:00
25 Questions

1. The molecular weight of urea ((NH2)2CO), a compound used as a nitrogen fertilizer, is __________ amu.
2. Lithium and nitrogen react in a combination reaction to produce lithium nitride:
6Li (s) + N2 (g) . 2Li3N (s)
In a particular experiment, 3.50-g samples of each reagent are reacted. The theoretical yield of lithium nitride is__________ g.
3. Calculate the percentage by mass of nitrogen in PtCl2 (NH3 )2 .
4. Under appropriate conditions, nitrogen and hydrogen undergo a combination reaction to yield ammonia: N2 (g) + 3H2 (g) . 2NH3 (g)A 7.1-g sample of N2 requires __________ g of H2 for complete reaction.
5. A sample of C3H8O that contains 200 molecules contains __________ carbon atoms.
6. The formula weight of silver chromate (Ag2CrO4 ) is __________ amu.
7. Magnesium and nitrogen react in a combination reaction to produce magnesium nitride: 3 Mg + N2 . Mg3N2 In a particular experiment, a 9.27-g sample of N2 reacts completely. The mass of Mg consumed is __________ g.
8. The molecular weight of the ethanol (C2H5OH) is __________ amu.
9. Which of the following are combustion reactions?
1) CH4 (g) + O2 (g) . CO2 (g) + H2O (l) 2) CaO (s) + CO2 (g) . CaCO3 (s) 3) PbCO3 (s) . PbO (s) + CO2 (g) 4) CH3OH (l) + O2 (g) . CO2 (g) + H2O (l)
10. The formula weight of potassium phosphate (K3PO4 ) is __________ amu.
11. Of the reactions below, which one is a decomposition reaction?
12. The formula weight of calcium nitrate (Ca(NO3 )2 ) is __________ amu.
13. Which of the following are combination reactions?
1) CH4 (g) + O2 (g) . CO2 (g) + H2O (l) 2) CaO (s) + CO2 (g) . CaCO3 (s) 3) Mg (s) + O2 (g) . MgO (s) 4) PbCO3 (s) . PbO (s) + CO2 (g)
14. What is the empirical formula of a compound that contains 29% Na, 41% S, and 30% O by mass?
15. What is the empirical formula of a compound that is 64.8% C, 13.6% H, and 21.6% O by mass?
16. The mass % of Al in aluminum sulfate (Al2 (SO4 )3 ) is __________.
17. What is the maximum mass in grams of NH3 that can be produced by the reaction of 1.0 g of N2 with 3.0 g of H2 via the equation below? __________.
N2 (g) + H2 (g) . NH3 (g) (not balanced)
18. Lithium and nitrogen react in a combination reaction to produce lithium nitride:
6Li (s) + N2 (g) . 2Li3N (s)
How many moles of lithium are needed to produce 0.60 mol of Li3N when the reaction is carried out in the presence of excess nitrogen?
19. The formula weight of a substance is __________.
20. A compound that is composed of only carbon and hydrogen contains 80.0% C and 20.0% H by mass. What is the empirical formula of the compound?
21. How many atoms of nitrogen are in 10 g of NH4NO3 ?
22. Solid aluminum and gaseous oxygen react in a combination reaction to produce aluminum oxide:
4Al (s) + 3O2 (g) . 2Al2O3 (s)
In a particular experiment, the reaction of 2.5 g of Al with 2.5 g of O2 produced 3.5 g of Al2O3 . The % yield of the reaction is __________.
23. The mass % of F in the binary compound KrF2 is __________.
24. Sulfur and fluorine react in a combination reaction to produce sulfur hexafluoride:
S(s) + 3F2 (g) . SF6 (g)
The maximum amount of SF6 that can be produced from the reaction of 3.5 g of sulfur with 4.5 g of fluorine is__________ g.
25. The mass % of C in methane (CH4 ) is __________.

⚡ Recently practiced quizzes in this topic
Live quiz activity
Basic Chemistry Practice Test: Chemistry of the Nonmetals Chemistry Certification Basic Chemistry Basic Chemistry Practice Test: Aqueous Reactions and Solution Stoichiometry Basic Chemistry Practice Test: Organic and Biological Chemistry Basic Chemistry Practice Test: Matter and Measurement Basics Basic Chemistry Practice Test: Thermochemistry Basic Chemistry Practice Test: Basic Concepts of Chemical Bonding Basic Chemistry Practice Test: Modern Materials Basic Chemistry Practice Test: Intermolecular Forces, Liquids, and Solids
 
❤ If you liked Fatskills, consider supporting us by checking out The Life Manuals You Never Got.

🌈  Our mission is to help improve your scores in any subject and exam withonline quizzes, practice tests, study guides, & advice for students. Since 2018.
About | Explore | User Guide | Topics | Subjects | Doubt Solver | Career Aptitude Test | Answers | Free Tools | OSHA Basics Quiz | What Should We Know?
Privacy | Terms |
Without work one finishes nothing. - Ralph Waldo Emerson
© 2026 Fatskills.com

All trademarks, logos and brand names are the property of their respective owners. All company, product and service names used in this website are for identification purposes only. Use of these names, trademarks and brands does not imply endorsement.