For all the aromatic compounds resonance structures can be drawn. Resonance is the way to describe the bonding, in certain ions or molecules by the combination of the various contributing structures, into a hybrid structure or resonance hybrid in the valence bond theory. Resonance has the particular value to describe the delocalized electrons, within certain … Read more
Chemical Kinetics: Rate law and specific rate constant A rate law is an expression shows the relationship between the reaction rate and the concentrations of each reactant in a system. For any general reaction at a fixed temperature aA + bB → cC + dD Rate = k[A]m[B]n The specific rate constant (k) is the … Read more
Chemical Kinetics: Order and molecularity of a reaction Order The rate law shows an expression or equation which associates the rate of reaction to the concentrations of reactants at a constant temperature. The rate of a reaction depends on concentration while the rate constant is affected by temperature and the presence of a catalyst. The … Read more
Among the organisms of the species, the word competition can be described in the context of struggle, between the two or more organisms, belonging to the same or the different species. Mainly, this competition is for the available resources, on which they have to depend on their survival. A limited supply of one or … Read more
Common cold also known simply as cold is an upper infectious disease caused by many different viruses. Common cold is a disease that can be managed at homes. Causes of common cold More than 200 different types of viruses causes common cold with Rhinovirus causing 30 Symptoms Common cold symptoms typically occurs two to … Read more
Looking at sex-linked inheritance as traits whose genes are located on sex-chromosome or X chromosome. View from human beings angle, sex is determined by a pair of chromosomes refers to as sex chromosomes, having that XY mechanism. The male is heterogametic XY and the woman is homogametic that’s XX. Though, the genes present on … Read more
Co-dominance can be seen as a relationship between two versions of a gene. Individuals receive a version of a gene, which referred to as an allele, from each parent. When these alleles are different, the dominant allele usually will be expressed, while the impact of the other allele, called recessive, is masked. In co-dominance, … Read more
A gene is the fundamental physical and functional element of heredity. Genes are composed of DNA. They contain specific instructions for protein synthesis. Genes are located in chromosomes. The body cells have a constant number of paired chromosomes. The two chromosomes of a pair are known ashomologous chromosomes. In human body cells, there are … Read more
Chemical Kinetics: Factors affecting the rate of a reaction Catalyst The rate of a reaction can be dramatically increased by supplying heat energy and/or increasing the concentration of reactants. However, heat gain is not always the best or the most practical thing to do. For example, suppose that you want to increase the rate of … Read more
Chemical Kinetics: Factors affecting the rate of a reaction Temperature Rate of a reaction depends on the fraction of “effective collisions” per unit time. Effective collisions are those with proper orientation and enough energy to overcome the activation energy Ea barrier. When the reactant particles collide with the required activation energy, they form an activated … Read more