Hydrocarbons practice problems

The manufacture of steel is a very important process. Complete this equation by balancing it. Fe2O3 + C → Fe + CO2

2Fe2O3 + 3C → 4Fe + 3Co2

Well over _______ different organic compounds are known to exist. 4 hundred 4 thousand 4 million 4 billion

4 million

T/F A major problem associated with the incomplete combustion of soft coal is pollution.

True

T/F Carbon chains can form branches and cross-links.

True

Select all that apply. Distilled products obtained from heating coal that contains many carbon compounds are: coke coal tar coal gas lignite

coal tar coal gas

The residue of coal decomposition that is used in the manufacture of steel is called _____ .

coke

About 90% of natural gas consists of: propane butane ethane methane

methane

Match the following. 1. The process of evaporating a liquid and condensing the vapors to form a pure substance 2. Used to separate the various compounds of a liquid mixture 3. Easily changes to a gas or vapor 4. A chemical compound composed of only hydrogen and carbon

1. Distillation 2. Fractional distillation 3. Volatile 4. Hydrocarbon

Arrange the following alkanes in order of increasing boiling point, with one being the lowest and five being the highest. octane hexane methane ethane decane

1. methane 2. ethane 3. hexane 4. octane 5. decane

Each year over _______ new organic compounds are produced. 1,000 10,000 100,000 1,000,000

100,000

Gasoline is that distillation fraction that has a boiling point range of _____ ° to _______ °C.

40 206

A major source of today's medicines is __________ . natural gas kerosene coal fuel oil

Coal

T/F There are many more inorganic than organic compounds.

False

T/F Hydrocarbons are separated from each other by a process called cracking distillation.

False

T/F Clues about the history of the earth have been obtained from the study of fossil fuels.

True

T/F Each organic compound has distinctive chemical and physical properties.

True

T/F Hydrocarbons contain only carbon and hydrogen.

True

T/F Physical man is an organic being.

True

T/F The balance of nature has its foundation in the study of organic chemistry.

True

T/F The boiling point and distillation temperature of a substance are the same.

True

To what temperature must propane be cooled to remain a liquid at standard sea level? any temperature below 40°C any temperature above -42°C at or below -42°C below 20°C

at or below -42°C

As the number of carbons in the hydrocarbon increases, the boiling point ______.

increases

A primary source of hydrocarbons is: petroleum natural gas coal rain forest materials

petroleum

The chemicals added to natural gas to give the gas an odor are a compound containing ______.

sulfur

Carbon atoms can form chains _______ of atoms long. hundreds thousands millions billions

thousands