Multiple choice

1. What is the formula for the ionic compound containing iron (III) ions and iodide ions?

A) FeI B) Fe2I C) FeI2 D) FeI3 E) Fe3I

2. What is the formula for the ionic compound containing sodium ions and nitride ions?

A) NaN B) Na2N C) NNa2 D) Na3N E) NNa3

3. What is the formula for the ionic compound containing calcium ions and oxide ions?

A) CaO B) Ca2O C) CaO2 D) Ca3O E) CaO3

4. What are the two different ions present in the compound Al(NO3)3?

A) Al3+, (NO3)3- D) Al3+, NO33-

B) Al+, NO3- E) Al+, (NO3)3-

C) Al3+, NO3-

5. What are the two different ions present in the compound NH4NO3?

A) NH4-, NO3+ D) NH43+, NO4-

B) NH4+, NO3- E) NH4+, NO3-

C) N3-, H+, O2-

6. A compound with an empirical formula of C2H4Br has a molar mass of 215.90 g/mol. What is the molecular formula?

A) C4H8Br2 B) C2H4Br C) CHBr D) C6H12Br3 E) C4H8Br

7. Which one of the following is an example of a balanced chemical reaction?

A) C3H6O + 4O2  3CO2 + 3H2O D) 2C3H6O + 9O2  6CO2 + 3H2O

B) 2C3H6O + 9O2  6CO2 + 6H2O E) C3H6O + 9O2  3CO2 + 3H2O

C) C3H6O + 3O2  3CO2 + 3H2O

8. Aluminum metal reacts with nitric acid to produce aluminum nitrate and hydrogen gas. Identify the balanced reaction that describes this process.

A) Al + HNO3  AlNO3 + H2                          D) Al + 3HNO3  Al(NO3)3 + H2

B) Al + HNO3  AlNO3 + H                             E) 2Al + 6HNO3  2Al(NO3)3 + 3H2

C) Al + 2HNO3  Al(NO3)2 + H2

9. The reaction of 44.1 g of Cr2O3 with 35.0 g of Al produced 25.6 g of Cr. What is the percent yield for this reaction?

2Al + Cr2O3  Al2O3 + 2Cr

A) 37.9 % B) 58.0 % C) 73.1 % D) 84.9% E) 100%

10. Identify the major ionic species present in an aqueous solution of C6H12O6 (glucose).

A) 6 C-, 12 H+, 6 O- D) C6+, 12 H+, 6 O2-

B) 6 C+, 12 H+, 6 O2- E) no ions are present

C) 6 CH2+, 6 O2-