Industry Analysts Estimate That the Number of E-Mail Mailboxes Worldwide

question 262

Multiple Choice

Industry analysts estimate that the number of e-mail mailboxes worldwide will grow to __________ by 2016.

• A)2.1 billion
• B)2.5 billion
• C)3.1 billion
• D)3.5 billion
• E)4.3 billion

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Definitions:

Magnesium Oxide

A white hygroscopic solid mineral used as an antacid and mild laxative, and in numerous industrial applications.

Balanced Chemical Equation

An equation that represents a chemical reaction with equal numbers of atoms for each element in both reactants and products.

Reduction

A chemical process involving the gain of electrons or the decrease in oxidation state by a molecule, atom, or ion.

Oxidation Number

A measure of the degree of oxidation of an atom in a substance, indicating the number of electrons lost or gained by an atom.