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Physical Properties and Molecular Structure of Organic compound
** So far, we have said little about one of the most obvious characteristics of organic compounds— that…
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Number of Signals in NMR Spectroscopy
The Number of Signals – In general, the number of NMR signals corresponds to the number of different kinds of…
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Difference between Isotopes, Isobar, and Isotones
In this subject, the Difference between Isotopes, Isobar, and Isotones will be discussed with some Common Examples for all types.…
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Derivation of the phase rule
Derivation of the phase rule – Here the derivation of the phase rule for one-component system and two-component system are…
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Atoms and Molecules
Democritus’s ideas about atoms – The Greek philosopher Democritus (470–400 BC) suggested that all matter is composed of tiny, discrete,…
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Molecular Orbital Theory
Molecular Orbital Theory – The molecular orbital theory proposed by Hund and Mulliken in 1932 explains the formation of a…
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Some Important Units of Measurement in Analytical Chemistry
SI Units – Scientists throughout the world have adopted a standardized system of units known as the International…
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Calculating the pH of Weak Acid and Base Solutions
– In this subject, we will discuss Calculating the pH of Weak Acid and Base Solutions Total and partial ionization…
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Fundamentals of Chemistry book by Romain Elsair – Free download
– In this subject, we will discuss the free download of Fundamentals of Chemistry book by Romain Elsair. Aim of…
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Analytical Chemistry book by Gary D.Christian – Free Download
– In this subject, we will discuss the Free Download Analytical Chemistry book (7th edition) by Gary D.Christian Introduction to…
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Tertiary structure of globular proteins
– In the last topic in biochemistry in our website, we talked about: Primary structure of Protein , Secondary Structure…
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Amino acids – Structure of Amino acids
Structure of Amino acids – Although more than 300 different amino acids have been described in nature, only 20 are…
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Chemical Bonding – Orbital Concept – MCQ test
Online MCQ test on Chemical Bonding – Orbital Concept – In this topic we offer you, online MCQ test in…
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Structure of atom – Classical mechanics – Online MCQ test
Online MCQ test on Structure of atom – Classical mechanics – In this topic we offer you, online MCQ test…













