The Supernova That Created the Crab Nebula and Its Pulsar

question 8

Multiple Choice

The supernova that created the Crab nebula and its pulsar was seen on Earth in the year

• A) 1604 BC.
• B) 1054 BC.
• C) 1054 AD.
• D) 1592 AD.
• E) 1604 AD.

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Definitions:

Mechanism

Describes the step-by-step sequence of elementary reactions by which overall chemical change occurs.

Racemic

Referring to a mixture of equal amounts of two enantiomers of a chiral molecule.

Hydride Shift

A rearrangement reaction where a hydride ion (H-) moves from one carbon atom to another within a molecule, often observed in carbocation rearrangements.

Iodobutane

An organic compound with the formula C4H9I, characterized as a butane molecule where one hydrogen atom has been replaced by an iodine atom.