Review Quiz #7

Comment: Provide ALL correct answers for each problem.

Comment 2: These kinds problems are discussed in General Chemistry 1 but not Basic Chemistry.

The quizzes become increasingly more interesting. This quiz should take you about 20 minutes if you have good preparation. If you have difficulty with these topics, we STRONGLY recommend that you review the videos that we have listed.

Please remember, you are allowed a calculator AND a periodic table!

1. What is the oxidation state of oxygen in Fe2O3?

 
 
 
 
 

2. What is the oxidation state of Osmium in OsO4?

 
 
 
 
 

3. Is elemental bromine more likely to be oxidized or reduced?

 
 
 
 
 

4. In the reaction below, which atom or species is oxidized and which is reduced?

2Na(0) + Cl2 –> 2NaCl

 
 
 
 
 

5. Ammonia (NH3) is produced according to the reaction:  2NO + 5H2 —> 2NH3 + 2H2O

How many grams of NH3 produced in a reaction using 86.3 g of NO and 25.6 g of H2?

 
 
 
 
 

6. According to the Center for Disease Control, a lead level of greater than 5.0 ug/dL in children can lead to cognitive or behavioral problems. What is this concentration in moles/L?

 
 
 
 
 

7. Dopamine is an important neurotransmitter but is dangerous at high doses. The dose that is expected to be fatal in 50% of a population of mice is 59 mg dopamine/kg body weight when dopamine is administered directly into bloodstream. How many mg of dopamine must be given to the average house mouse that has a weight if 0.68 oz? (Note 1 oz = 28.34 g and 1000 mg = 1 g = 0.001 kg)

 
 
 
 
 

8. The base pairs in DNA are stacked on one another in duplex DNA and are 3.4 Å apart. How many mm is this? (Note: 1 m = 1010 Å and 1m = 1000 mm).

 
 
 
 
 

9. Estradiol is a female sex hormone. Which formula is(are) consistent with the MW of estrogen (MW = 272), which is comprised only of C, H, and O? (atomic weights: C = 12; O = 16; H = 1)

 
 
 
 
 

10. For this reaction, which is the correct form for the oxidation half reaction?

3FeO + H2O2 —> Fe2O3 + 2H2O

 
 
 
 
 

11. What is your current status?