Physical Sciences Grade 10 Term 2
... HOMEWORK QUESTIONS/ ACTIVITY (educator must give learners a few questions to answer at home by either writing them on the chalkboard or giving an exercise from the prescribed textbook) [10 min] 1. For each of the following definitions give the correct term: 1.1 a change that can be seen or felt wher ...
... HOMEWORK QUESTIONS/ ACTIVITY (educator must give learners a few questions to answer at home by either writing them on the chalkboard or giving an exercise from the prescribed textbook) [10 min] 1. For each of the following definitions give the correct term: 1.1 a change that can be seen or felt wher ...
Chemistry of Riming: The Retention of Organic and Inorganic
... In the present experiments single component systems were investigated so that the chemical properties were mainly determined by the substances themselves. This implies that possible interactions between various species present in the liquid phase are not considered (with the exception of CO2 ). As l ...
... In the present experiments single component systems were investigated so that the chemical properties were mainly determined by the substances themselves. This implies that possible interactions between various species present in the liquid phase are not considered (with the exception of CO2 ). As l ...
Hybridization of atomic orbitals
... Atomic orbitals are (energy) states or wave forms of electrons in the atom. If we insist on the particle nature of electrons, then the probability of finding an electron in an atomic orbital is proportional to the square of the wavefunction. The values of the wavefunction can be either positive or n ...
... Atomic orbitals are (energy) states or wave forms of electrons in the atom. If we insist on the particle nature of electrons, then the probability of finding an electron in an atomic orbital is proportional to the square of the wavefunction. The values of the wavefunction can be either positive or n ...
Calculations with Chemical Formulas and Equations
... – C is determined from the mass of CO2 produced – H is determined from the mass of H2O produced – O is determined by difference after the C and H have been Stoichiometry determined ...
... – C is determined from the mass of CO2 produced – H is determined from the mass of H2O produced – O is determined by difference after the C and H have been Stoichiometry determined ...
Chemical Quantities(mole).
... 2. Mole to mole (ratio) 3. Mole to mass c. Limiting Reagent (or reactant): The reagent that limits or determines the amount of substance (product) that is formed in a reaction. Excess reagent (reactant): any substance (reactant) that is left over. ...
... 2. Mole to mole (ratio) 3. Mole to mass c. Limiting Reagent (or reactant): The reagent that limits or determines the amount of substance (product) that is formed in a reaction. Excess reagent (reactant): any substance (reactant) that is left over. ...
Calculations and the Chemical Equation
... for defining a "collection" of atoms is the mole, Avogadro's number of particles. Calculations based on the chemical equation relate the number of atoms, moles and their corresponding mass. Conversion factors are used to relate the information provided in the problem to the information requested by ...
... for defining a "collection" of atoms is the mole, Avogadro's number of particles. Calculations based on the chemical equation relate the number of atoms, moles and their corresponding mass. Conversion factors are used to relate the information provided in the problem to the information requested by ...
Chemistry MCQS 12 class
... 2. so far 110 elements have been discovered. Out of these __________ elements are naturally ...
... 2. so far 110 elements have been discovered. Out of these __________ elements are naturally ...
university of zagreb - Hrvatsko fizikalno društvo
... elected to their positions according to the highest criteria, on the basis of their achievements in science, which have been internationally recognized. At the same time, they always try their best to improve education of physics and chemistry, by implementation of modern ideas in teaching methods, ...
... elected to their positions according to the highest criteria, on the basis of their achievements in science, which have been internationally recognized. At the same time, they always try their best to improve education of physics and chemistry, by implementation of modern ideas in teaching methods, ...
Department of Chemistry
... Chemistry is the scientific study of the composition and properties of matter and the investigation of the laws that govern them. Classically, chemistry is divided into several subdisciplines. Organic chemistry deals primarily with carbon compounds; inorganic chemistry, with compounds of the other e ...
... Chemistry is the scientific study of the composition and properties of matter and the investigation of the laws that govern them. Classically, chemistry is divided into several subdisciplines. Organic chemistry deals primarily with carbon compounds; inorganic chemistry, with compounds of the other e ...
CLUE - virtual laboratories
... fundamental ideas upon which chemistry is based. These are important ideas that students need to learn, and learn in a robust way that enables them to transfer their understanding to new situations rather than just remember what they were told. It would be even better if we could cultivate an apprec ...
... fundamental ideas upon which chemistry is based. These are important ideas that students need to learn, and learn in a robust way that enables them to transfer their understanding to new situations rather than just remember what they were told. It would be even better if we could cultivate an apprec ...
Support Material
... A compound made up of elements ‘A’ and ‘B’ crystallises in a cubic close packed structure. Atoms A are present on the corners as well as face centres, whereas atoms B are present on the edge-centres as well as body centre. What is the formula of the compound? ...
... A compound made up of elements ‘A’ and ‘B’ crystallises in a cubic close packed structure. Atoms A are present on the corners as well as face centres, whereas atoms B are present on the edge-centres as well as body centre. What is the formula of the compound? ...
The integration of flow reactors into synthetic organic chemistry
... conduct chemical synthesis has remained relatively unchanged for over two centuries.12 – 14 Remarkably, apparatus such as standard glass round bottom flasks, condensers, measuring cylinders, test tubes and Bunsen burners are all still commonly in use today despite them being invented over 160 years ...
... conduct chemical synthesis has remained relatively unchanged for over two centuries.12 – 14 Remarkably, apparatus such as standard glass round bottom flasks, condensers, measuring cylinders, test tubes and Bunsen burners are all still commonly in use today despite them being invented over 160 years ...
Magnetic and Electric Deviation of the Easily Absorbed Rays
... Experiments are in progress to determine the charge carried by the α rays, and from these it is hoped to deduce the rate of emission of energy in the form of α rays from the active substances. The projection character of the α rays very readily explains some of their characteristic properties. On th ...
... Experiments are in progress to determine the charge carried by the α rays, and from these it is hoped to deduce the rate of emission of energy in the form of α rays from the active substances. The projection character of the α rays very readily explains some of their characteristic properties. On th ...
Future perspectives in catalysis - NRSC
... catalysts within reach. Scientists have found a common molecular basis for the chemical processes for which catalysis is used. These research fields have now been unified to form a general scientific framework. That means heterogeneous, homogeneous and bio-catalysis can now be studied within a singl ...
... catalysts within reach. Scientists have found a common molecular basis for the chemical processes for which catalysis is used. These research fields have now been unified to form a general scientific framework. That means heterogeneous, homogeneous and bio-catalysis can now be studied within a singl ...
O - Montville.net
... 1 mole of O2 is need to react… 1. What relationships can be found in this equation? ...
... 1 mole of O2 is need to react… 1. What relationships can be found in this equation? ...
Chapter 3 Stoichiometry: Calculations with Chemical Formulas and
... • Compounds containing C, H and O are routinely analyzed through combustion in a chamber like this. – C is determined from the mass of CO2 produced. – H is determined from the mass of H2O produced. – O is determined by difference after the C and H have been ...
... • Compounds containing C, H and O are routinely analyzed through combustion in a chamber like this. – C is determined from the mass of CO2 produced. – H is determined from the mass of H2O produced. – O is determined by difference after the C and H have been ...
Stoichiometry: Calculations with Chemical Formulas and Equations
... • Compounds containing C, H and O are routinely analyzed through combustion in a chamber like this. – C is determined from the mass of CO2 produced. – H is determined from the mass of H2O produced. – O is determined by difference after the C and H have been ...
... • Compounds containing C, H and O are routinely analyzed through combustion in a chamber like this. – C is determined from the mass of CO2 produced. – H is determined from the mass of H2O produced. – O is determined by difference after the C and H have been ...
Stoichiometry: Calculations with Chemical Formulas and Equations
... • Compounds containing C, H and O are routinely analyzed through combustion in a chamber like this. – C is determined from the mass of CO2 produced. – H is determined from the mass of H2O produced. – O is determined by difference after the C and H have been ...
... • Compounds containing C, H and O are routinely analyzed through combustion in a chamber like this. – C is determined from the mass of CO2 produced. – H is determined from the mass of H2O produced. – O is determined by difference after the C and H have been ...
History of chemistry
The history of chemistry represents a time span from ancient history to the present. By 1000 BC, civilizations used technologies that would eventually form the basis to the various branches of chemistry. Examples include extracting metals from ores, making pottery and glazes, fermenting beer and wine, extracting chemicals from plants for medicine and perfume, rendering fat into soap, making glass, and making alloys like bronze.The protoscience of chemistry, alchemy, was unsuccessful in explaining the nature of matter and its transformations. However, by performing experiments and recording the results, alchemists set the stage for modern chemistry. The distinction began to emerge when a clear differentiation was made between chemistry and alchemy by Robert Boyle in his work The Sceptical Chymist (1661). While both alchemy and chemistry are concerned with matter and its transformations, chemists are seen as applying scientific method to their work.Chemistry is considered to have become an established science with the work of Antoine Lavoisier, who developed a law of conservation of mass that demanded careful measurement and quantitative observations of chemical phenomena. The history of chemistry is intertwined with the history of thermodynamics, especially through the work of Willard Gibbs.