# class 11 chemistry notes

## How to Calculate Moles

Mole in Chemistry In Science, the concept of a mole is usually used to measure the number of particles. Such as a molecule like Helium has an atomic weight of an atom is 4.002602 and replacing with a complex molecule like sucrose (C12H22O11) has an atomic weight of 342.30 so here the value of a …

## How do you calculate Unit of Kc for PCl5

Unit of kc for pcl5 The unit of an equilibrium constant KC for the subsequent chemical reaction is: PCl5​⇌PCl3​+Cl2​ We are aware that the constant of equilibrium Kc = concentration of products/concentration of reactants The equilibrium expression for PCl5 PCl3 Cl3l is: Kc ​= [PCl5​] [PCl3​]×[Cl2​] ​Kc​=mole/dm3 X mole/dm3 mole/dm3​ Kc​=mole/dm3 The units of Kc …

## What is the unit of KC in the reaction 2SO2 O2 ⇔ 2SO3?

Unit of KC in the reaction 2SO2 O2 ⇔ 2SO3 Equilibrium constant kc is defined as the ratio of the forward reaction rate constant to the reverse reaction rate constant. How do you write KC expressions? Kc units vary based on the concentrations of each reactant and product in the equation. It is also feasible that …

## State Boyle’s law give its Mathematical Expression

State Boyle’s law give its mathematical expression Robert Boyle, in 1662, gave this law. It relates the pressure and volume of ideal gases at constant temperature and mass. Boyle’s Law Statement “For a fixed mass of a gas, the volume is inversely proportional to the pressure at a constant temperature.”     Thus law can also be …

## Valence and Orbital Concept of Chemical Bonding Chemistry

Explain the Valence and Orbital Concept of Chemical bonding? ANSWER:There are two concepts, which explain chemical bonding.A. The Valence ConceptB. The Orbital Concept Valence Concept (Electric theory of valence) of Chemical bonding INTRODUCTION:G.N Lewis and W. Kossel in 1916, gave the electronic theory of valence. The Valence Concept: STATEMENT:It states that,“In the formation of a …

## Main Principles of Kinetic Molecular Theory of Gases – States of matter Gases Chemistry

Kinetic Molecular Theory of Gases: The kinetic molecular theory of gases explains the physical behaviour of gases. Main Principles of Kinetic Theory of Gases: It has the following main principles or postulates. All gases consist of molecules which are widely separated from each other. Space occupied by gas molecules is negligible as compared to space …

## Comparison of three states of matter – my Digital Kemistry

Matter: Anything that has mass, as well as volume, is called matter. Matter exists in four states i.e. solid, liquid, gas and plasma. Comparison of three states of matter Some Important Uses of Liquid Gases: Compressed natural gas (CNG) is used as fuel in vehicles. Liquid oxygen is used in hospitals for patients suffering from …

## Solubility, Reactions and nature of Ionic and Covalent Compounds – my Digital Kemistry

Effect of bonding on physical and chemical properties:             Physical properties depend upon intermolecular forces (Hydrogen bonding, Dipole-dipole forces & London dispersion forces). While chemical properties depend upon intramolecular forces (Chemical bonds). (i)       Solubility of Ionic and Covalent compounds: Solubility is based on the fact “like dissolve like”. e.g. ionic compounds are more soluble in …

## What is dipole moment in Simple Words?

Dipole Moment (µ) definition: In simple words, the dipole moment is the product of charge +ve or –ve and the distance between the centres of charges. Dipole moment is the measure of separation of charges and also the measure of the polarity of bond and polarity of the molecule. Dipole moment Formula:     µ = …