fundamentals of chemistry

Define Empirical Formula and Molecular Formula with Examples

Empirical formula and Molecular formula Empirical Formula The formula which shows the simplest whole number ratio of atoms of elements in a compound is called the empirical formula. Empirical Formula Example The actual formula for hydrogen peroxide is H2O2 which shows that there is one hydrogen atom for every oxygen atom. Therefore the simplest ratio …

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Formula Unit, Ion , Molecular ion and Free Radical

Formula Unit, Ion, Molecular ion and Free Radical Write a note on the following 1. Formula Unit  2. Ion 3. Molecular ion 4. Free Radical FORMULA UNIT The smallest repeating unit of an ionic compound which shows the simplest ratio between its ions is called the formula unit. EXAMPLE The simplest ratio between Mg and …

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Relative atomic mass, Atomic mass unit and Average atomic mass

Relative atomic mass, Atomic mass unit and Average atomic mass Q. Write a note on the following Relative atomic mass Atomic mass unit  Average atomic mass ANSWER RELATIVE ATOMIC MASS The mass of one atom of an element is compared with one-twelfth [1/12] the mass of one atom of carbon-12. Explanation The mass of one atom …

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Define element compound and mixture with examples

Define element, compound and mixture with examples. Element An element is a pure substance that cannot be broken down into smaller substances. Each element’s atoms include the same atoms, which have identical structural and chemical properties. There are 118 naturally occurring elements, of which 92 are found in nature and the remainder are created in …

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define mole

Fundamentals of Chemistry Important Question Answers pdf Free Download

Fundamentals of Chemistry Important question answers Chemistry Class 9 Chapter 1 pdf Free Download Introduction to Chemistry Different Branches of Chemistry Physical Chemistry, Organic Chemistry, Inorganic Chemistry, Biochemistry, Industrial Chemistry, Nuclear Chemistry, Environmental Chemistry, Analytical Chemistry Basic Definitions Elements, Compounds and Mixtures Atomic Number, Mass Number Relative Atomic Mass and Atomic Mass Unit Empirical Formula, …

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states of matter

Fundamentals of Chemistry Chapter 1 pdf Notes, mcqs , Video Lectures

Fundamentals of Chemistry pdf Notes Class 9 Chemistry Chapter 1 Learning Objective Chemistry Introduction Branches of Chemistry ->Physical Chemistry->Organic Chemistry->Inorganic Chemistry->Biochemistry->Industrial Chemistry->Nuclear Chemistry->Environmental Chemistry->Analytical Chemistry Basic Definitions Elements, Compounds and Mixtures Atomic Number, Mass Number Relative Atomic Mass and Atomic Mass Unit Empirical Formula, Molecular Formula Molecular Mass and Formula Mass Chemical Species Ions (Cations, …

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Fundamentals of Chemistry Notes

Fundamentals of Chemistry What exactly is science? Science is the systematic body of knowledge gathered via observations and experimentation. Explanation Our five senses acquire information about the material cosmos, which forms knowledge. When the authenticity and veracity of facts are proved through experiments, however, this is referred to as science. Example: Water freezes at 0 …

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Chemistry Class 9 Chapter 1 mcqs Federal Board

Chemistry Class 9 Chapter 1 mcqs Federal Board Fundamentals of Chemistry Important MCQs Federal Board 9th Class mcqs 1. There are———–known elements. A. 101 B. 109 C. 118 D. 126 ANSWER.C 2. Atoms or groups of atoms with unpaired electrons are known ……….. A.compounds B.mixture C.molecules D.free radicals ANSWER.D Continue Reading Free radicals 3. A gas contains …

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How to find Excess and Limiting reactants |Reagents | Chemistry

Do you know! You can easily find excess and limiting reactants Firstly, you must know that !! What is Limiting reactant and excess reactant? Limiting Reactant Definition: The reactant which is used up completely and earlier in a chemical reaction is called a limiting reactant. Limiting reactant is also known as limiting reagent . Excess …

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