2. Chemical Reactions- Standard Warmups

3. 1. In a chemical reaction, there is conservation of – A Energy, volume, and mass B Energy, volume, and charge C Mass, charge, and energy D Mass, charge, and volume

4. Answer C is the correct answer.

5. 2. Given the balanced equation representing a reaction: Cl 2 → Cl + Cl Cl 2 → Cl + Cl A A bond is broken as energy is absorbed. B A bond is broken as energy is released. C A bond is formed as energy is absorbed. D A bond is formed as energy is released.

6. Answer A is the correct answer.

7. 3. What is the chemical formula of iron(III) sulfide? A FeS B Fe 2 S 3 C FeSO 3 D Fe 2 (SO 3 ) 3

8. Answer B is the correct answer.

9. 4. Given the balanced equation representing a reaction: Zn(s) + H 2 SO 4 (aq) → ZnSO 4 (aq)+ H 2 (g) Zn(s) + H 2 SO 4 (aq) → ZnSO 4 (aq)+ H 2 (g) Which type of reaction is represented by this equation? Which type of reaction is represented by this equation? A decomposition B double replacement C single replacement D synthesis

10. Answer C is the correct answer.

11. 5. Given the balanced equation representing a reaction: 2NaCl → 2Na + Cl 2 2NaCl → 2Na + Cl 2 To break the bonds in NaCl, the reactant must To break the bonds in NaCl, the reactant must A Absorb energy B Create energy C Destroy energy D Releases energy

12. Answer A is the correct answer.

13. 6. A molecular compound is formed when a chemical reaction occurs between atoms of– A chlorine and sodium B chlorine and yttrium C oxygen and hydrogen D oxygen and magnesium

14. Answer C is the correct answer.

15. 7. Which balanced equation represents a single replacement reaction – A Mg + 2AgNO 3 → Mg(NO 3 ) 2 + 2Ag B 2Mg + O 2 → 2Mg C MgCO 3 → MgO + CO 2 D MgCl 2 + 2AgNO 3 → 2AgCl + Mg(NO 3 ) 2

16. Answer A is the correct answer.

17. 8. A balanced equation representing a chemical reaction can be written using – A chemical formulas and mass number B chemical formulas and coefficients C first ionization energies and mass number D first ionization energies and coefficient

18. Answer B is the correct answer.

19. 9. In which type of reaction do two or more substances combine to produce a single substance A synthesis B decomposition C single replacement D double replacement

20. Answer A is the correct answer.

21. 10. An ionic compound is formed when there is a reaction between the element – A oxygen and chlorine B strontium and chlorine C nitrogen and oxygen D sulfur and oxygen

22. Answer B is the correct answer.