Question

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Answer 1

Explanation:

BRITANNICA

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Stereoisomers of more complex molecules

An atom is stereogenic if switching any two atoms or groups of atoms that are bound to it results in a pair of stereoisomers. So far, molecules with no or only one stereogenic atom have been discussed. Very often the situation is more complex; indeed, there can be several stereogenic atoms in a molecule. A molecule with only one stereogenic atom has only two stereoisomers—the R and

Answer 2

Answer:

A complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i represents the imaginary unit, satisfying the equation i2 = −1. Because no real number satisfies this equation, i is called an imaginary number. For the complex number a + bi, a is called the real part, and b is called the imaginary part. The set of complex numbers is denoted using the symbol {\displaystyle \mathbb {C} }\mathbb {C} . Despite the historical nomenclature "imaginary", complex numbers are regarded in the mathematical sciences as just as "real" as the real numbers, and are fundamental in many aspects of the scientific description of the natural world.[note 1][1][2][3][4]