chemistry2

1. Write balanced chemical equations to represent these reactions. Hint: Nitrogen and oxygen are both diatomic molecules.

a. Nitrogen reacts with oxygen to form nitrogen monoxide.

b. Ozone decomposes into oxygen and atomic oxygen (O).

c. Sulfur reacts with oxygen to form sulfur trioxide.

2. Balance these equations in which ethane (C2H4) burns in oxygen.

a. C2H4(g) + O2(g) →C(s) + H2O(g)

b. C2H4(g) +O2(g)→CO(g)+H2O(g)

c. . C2H4(g) +O2(g)→CO2(g)+H2O(g)

3. Count the atoms on both sides of the arrow to demonstrate that these equations are balanced.

a. 2 C3H8(g)+7 O2(g)→6 CO(g)+8 H2O(l)

b. 2 C8H18(g)+25 O2(g)→16 CO2(g)+18 H2

4. Assuming that the octet rule applies, draw the Lewis structure for each of these molecules.

a. CCL4

b. H2O2

c. H2S

d. N2

e. HCN

f. N2O

g. CS2

5. Arrange these types of radiation in order of increasing energy per photon: gamma rays, infrared radiation, radio waves, visible light.

6. For each of these atoms, draw a Lewis structure. Also draw the Lewis structure for the corresponding ion.

a. S

b. Ne

c. Li