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Natural gas is usually 95 to 98 percent __________________.

How many mononitration products are possible in the nitration of naphthalene, shown below?

The molecular structure to the right is all of the following except: CH3 – CH2 – CH2 – CH3

Porosity indicates a ratio of the empty spaces in the rock to the solid spaces in the rock. The ratio is usually expressed as a percentage.

Absolute pressure is determined by adding the _____________ and the gauge pressures.

When hydrocarbons (oil or gas) migrate through channels or fractures to regions of lower pressure, they usually travel deeper into the earth.

Gauge pressure is the pressure above or below ___________________________________.

Foretelling the future of a gas well may depend on –

Absolute pressure is reported as pounds per square inch gauge (psig).

The specific gravity of a liquid is usually expressed as a ratio of mass of a given volume of liquid to the mass of an equal volume of water.  The specific gravity of a gas is expressed as the ratio of the mass of a given volume of gas to the mass of and equal volume of ______________________.