Electromagnetic radiation

Electromagnetic radiation

1. Which of the listed types of electromagnetic radiation has the longest wavelength?

a. Ultraviolet

b. X-ray

c. Infrared

d. Microwave

2. Which element has the highest ionization energy?

a. Sn

b. S

c. Si

d. F

3. Which element is most metallic?

a. Al

b. N

c. P

d. O

4. Which property decreases as you move down a column in the periodic table?

a. Atomic size

b. Ionization energy

c. Metallic character

d. None of the above

5. Which property increases as you move from left to right across a row in the periodic table?

a. Atomic size

b. Ionization energy

c. Metallic character

6. Consider the reaction:

• 2 CO(g) + O2 (g)  →  2 CO2  (g)

If the reaction mixture contains:

28 grams CO

32 grams O2

What is the limiting reagent?

7. Consider the reaction:

• 2 N2 (g) + 5 O2 (g) + 2 H2 O(g)  →  4  HNO3 (g)
• If the reaction mixture contains:

28 grams N2

150 grams O2

36 grams H2 O

What is the limiting reagent?

8. Urea (CH4 N2 O), a common fertilizer, can be synthesized by the reaction of ammonia (NH3 ) with carbon dioxide (CO2 )

2 NH3 (aq) + CO2 (aq)  →  CH3 N2 O(aq) + H2 O(l)

Given:

68.2 grams NH3

105 grams CO2 

87.5 grams of urea (CH4 N2 O) was produced.

Determine the limiting reagent, theoretical yield of urea, and percent yield of the reaction.