Steel Was Introduced for Use in Construction in What Century

question 22

Multiple Choice

Steel was introduced for use in construction in what century?

• A)17^th
• B)18^th
• C)19^th
• D)20^th

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Definitions:

Lewis Acid

A chemical species that accepts an electron pair from a Lewis base to form a Lewis adduct, often involved in catalysis and various chemical reactions.

Base

Substances that accept protons according to the Brønsted-Lowry definition or donate electrons according to the Lewis definition, often part of chemical reactions as reactants.

IR Spectroscopy

A technique used to identify molecular vibrations by measuring the absorption of infrared radiation, useful in determining molecular structure.

N-Butylamine

A primary amine with the formula CH3(CH2)3NH2, used in various industrial and chemical processes.