Examlex
Which of the following is the conjugate acid of ammonia, NH3?
Outbreak
An occurrence of a disease greater than would otherwise be expected at a particular time and place.
Survey
A method of gathering information from a sample of people, typically by asking questions, to understand opinions, behaviors, or characteristics of a larger population.
Smallpox
A highly contagious and deadly disease caused by the variola virus, which was eradicated globally in 1980 through vaccination efforts.
Conquest of Mexico
The event in which the Spanish, led by Cortez, defeated and took control over the Aztec Empire in the early 16th century.
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