Papers by RUGWIRO JEAN FRANCOIS REGIS
AL PRACTICAL CHEMISTRY NATIONAL EXAMS AND MARKING SCHEMES 2009 to 2023, 2023
Some years ago, a question occasionally heard was “Why study chemistry?” At the core of the natur... more Some years ago, a question occasionally heard was “Why study chemistry?” At the core of the natural sciences, chemistry is crucial to an understanding of molecular biology, genetics, pharmacology, ecology, atmospheric science, nuclear studies, materials science, and numerous other fields. Because chemistry is so central to understanding these fields, it is a core requirement for an increasing number of academic majors. Some major societal issues also have chemical principles at their core, including climate change, energy options, materials recycling, diet, nutrition, exercise, and traditional vs. alternative medicine. Clearly, the study of chemistry as an integral part of our world is essential.
To respond to numerous modern challenges, chemistry is evolving in new directions to design “greener” plastics and fuels, monitor atmosphere and oceans to model global warming, determine our genetic makeup to treat disease, and synthesize nanomaterials with revolutionary properties, among many others.
Nevertheless, as the applications change, the basic concepts of chemistry still form the essence of the course. The mass laws and the mole concept still apply to the amounts of substances involved in a reaction. Atomic properties, and the periodic trends and types of bonding derived from them, still determine molecular structure, which in turn still governs the forces between molecules and the resulting physical behavior of substances and mixtures. And the central concepts of kinetics, equilibrium, and thermodynamics still account for the dynamic aspects of chemical change.
The challenge for a modern text surveying this enormous field is to present the core concepts of chemistry clearly and show how they apply to current practice. The first edition of COLLECTION OF ADVANCED LEVEL PRACTICAL CHEMISTRY NATIONAL EXAMINATIONS AND THEIR MARKING SCHEMES will evolve important ways to meet this challenge.
OL CHEMISTRY NATIONAL EXAMS AND MARKING SCHEMES 2001 to 2021 , 2022
Some years ago, a question occasionally heard was “Why study chemistry?” At the core of the natur... more Some years ago, a question occasionally heard was “Why study chemistry?” At the core of the natural sciences, chemistry is crucial to an understanding of molecular biology, genetics, pharmacology, ecology, atmospheric science, nuclear studies, materials science, and numerous other fields. Because chemistry is so central to understanding these fields, it is a core requirement for an increasing number of academic majors. Some major societal issues also have chemical principles at their core, including climate change, energy options, materials recycling, diet, nutrition, exercise, and traditional vs. alternative medicine. Clearly, the study of chemistry as an integral part of our world is essential.
To respond to numerous modern challenges, chemistry is evolving in new directions to design “greener” plastics and fuels, monitor atmosphere and oceans to model global warming, determine our genetic makeup to treat disease, and synthesize nanomaterials with revolutionary properties, among many others.
Nevertheless, as the applications change, the basic concepts of chemistry still form the essence of the course. The mass laws and the mole concept still apply to the amounts of substances involved in a reaction. Atomic properties, and the periodic trends and types of bonding derived from them, still determine molecular structure, which in turn still governs the forces between molecules and the resulting physical behavior of substances and mixtures. And the central concepts of kinetics, equilibrium, and thermodynamics still account for the dynamic aspects of chemical change.
The challenge for a modern text surveying this enormous field is to present the core concepts of chemistry clearly and show how they apply to current practice. The first edition of COLLECTION OF ORDINARY LEVEL CHEMISTRY NATIONAL EXAMINATIONS AND THEIR MARKING SCHEMES will evolve important ways to meet this challenge.
To respond to numerous modern challenges, chemistry is evolving in new directions to design “gree... more To respond to numerous modern challenges, chemistry is evolving in new directions to design “greener” plastics and fuels, monitor atmosphere and oceans to model global warming, determine our genetic makeup to treat disease, and synthesize nanomaterials with revolutionary properties, among many others.
Nevertheless, as the applications change, the basic concepts of chemistry still form the essence of the course. The mass laws and the mole concept still apply to the amounts of substances involved in a reaction. Atomic properties, and the periodic trends and types of bonding derived from them, still determine molecular structure, which in turn still governs the forces between molecules and the resulting physical behavior of substances and mixtures. And the central concepts of kinetics, equilibrium, and thermodynamics still account for the dynamic aspects of chemical change.
The challenge for a modern text surveying this enormous field is to present the core concepts of chemistry clearly and show how they apply to current practice. The first edition of COLLECTION OF ADVANCED LEVEL CHEMISTRY NATIONAL EXAMINATIONS AND THEIR MARKING SCHEMES will evolve important ways to meet this challenge.
Teaching Documents by RUGWIRO JEAN FRANCOIS REGIS
CARBON AND ITS INORGANIC COMPOUNDS, 2023
CARBON AND ITS INORGANIC COMPOUNDS
After studying this unit "CARBON AND ITS INORGANIC COMPOUNDS"... more CARBON AND ITS INORGANIC COMPOUNDS
After studying this unit "CARBON AND ITS INORGANIC COMPOUNDS" , the learners should be able to relate the properties of carbon and its compounds to its uses and describe how the compounds of carbon are prepared.
Thesis Chapters by RUGWIRO JEAN FRANCOIS REGIS
Final Project-CONTRIBUTION TO THE PRODUCTION OF COSMETIC PRODUCTS FROM A PLANT COMMONLY CALLED MACADAMIA, 2011
In Rwanda, as in the whole world, the valorization of natural resources is the main axis in the d... more In Rwanda, as in the whole world, the valorization of natural resources is the main axis in the development. Thus the exploitation of natural resources such as local plants can contribute to the development the industrial sector in our country by in the manufacture of cosmetics such as creams, lotions, beauty milks, soaps, ... necessary for our Rwandan people.
Macadamia (Macadamia Tetraphilla) the native plant from Australia is recognized as a source of oil that is very good for the manufacture of various cosmetic products.
Given the importance of this plant in cosmetology and the high cost of cosmetic products and the problems of dry skin, we set the goal of extracting oil from the seeds of this plant and manufacture cosmetics namely the cosmetic cream, liquid soap and hard soap from oil extracted from macadamia seeds.
We extracted the oil by the Soxhlet method, and then the oil has been refined in order to be used. From the established formulas, we have manufactured cosmetic products and we followed with the evaluation of quality of our obtained products.
The obtained results in our work showed that macadamia seeds contain a large amount of oil; the yield was good, in the two treated samples (one harvested from Nyamagabe District is equal to 60.88%, the other harvested from Nyaruguru District is to 62.61% ). The cream made was stable, its cost (1,148.27RwF) and quality is like other creams commonly known at the market, finally our soaps (liquid and hard) have good foaming and detergent properties as well as other known commercial detergents on the market, its pH is in the range of standard (the pH is equal to10 for hard soap and the pH is equal to 11 for hard soap), so our products can be used in order to satisfy our need without worry.
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Papers by RUGWIRO JEAN FRANCOIS REGIS
To respond to numerous modern challenges, chemistry is evolving in new directions to design “greener” plastics and fuels, monitor atmosphere and oceans to model global warming, determine our genetic makeup to treat disease, and synthesize nanomaterials with revolutionary properties, among many others.
Nevertheless, as the applications change, the basic concepts of chemistry still form the essence of the course. The mass laws and the mole concept still apply to the amounts of substances involved in a reaction. Atomic properties, and the periodic trends and types of bonding derived from them, still determine molecular structure, which in turn still governs the forces between molecules and the resulting physical behavior of substances and mixtures. And the central concepts of kinetics, equilibrium, and thermodynamics still account for the dynamic aspects of chemical change.
The challenge for a modern text surveying this enormous field is to present the core concepts of chemistry clearly and show how they apply to current practice. The first edition of COLLECTION OF ADVANCED LEVEL PRACTICAL CHEMISTRY NATIONAL EXAMINATIONS AND THEIR MARKING SCHEMES will evolve important ways to meet this challenge.
To respond to numerous modern challenges, chemistry is evolving in new directions to design “greener” plastics and fuels, monitor atmosphere and oceans to model global warming, determine our genetic makeup to treat disease, and synthesize nanomaterials with revolutionary properties, among many others.
Nevertheless, as the applications change, the basic concepts of chemistry still form the essence of the course. The mass laws and the mole concept still apply to the amounts of substances involved in a reaction. Atomic properties, and the periodic trends and types of bonding derived from them, still determine molecular structure, which in turn still governs the forces between molecules and the resulting physical behavior of substances and mixtures. And the central concepts of kinetics, equilibrium, and thermodynamics still account for the dynamic aspects of chemical change.
The challenge for a modern text surveying this enormous field is to present the core concepts of chemistry clearly and show how they apply to current practice. The first edition of COLLECTION OF ORDINARY LEVEL CHEMISTRY NATIONAL EXAMINATIONS AND THEIR MARKING SCHEMES will evolve important ways to meet this challenge.
Nevertheless, as the applications change, the basic concepts of chemistry still form the essence of the course. The mass laws and the mole concept still apply to the amounts of substances involved in a reaction. Atomic properties, and the periodic trends and types of bonding derived from them, still determine molecular structure, which in turn still governs the forces between molecules and the resulting physical behavior of substances and mixtures. And the central concepts of kinetics, equilibrium, and thermodynamics still account for the dynamic aspects of chemical change.
The challenge for a modern text surveying this enormous field is to present the core concepts of chemistry clearly and show how they apply to current practice. The first edition of COLLECTION OF ADVANCED LEVEL CHEMISTRY NATIONAL EXAMINATIONS AND THEIR MARKING SCHEMES will evolve important ways to meet this challenge.
Teaching Documents by RUGWIRO JEAN FRANCOIS REGIS
After studying this unit "CARBON AND ITS INORGANIC COMPOUNDS" , the learners should be able to relate the properties of carbon and its compounds to its uses and describe how the compounds of carbon are prepared.
Thesis Chapters by RUGWIRO JEAN FRANCOIS REGIS
Macadamia (Macadamia Tetraphilla) the native plant from Australia is recognized as a source of oil that is very good for the manufacture of various cosmetic products.
Given the importance of this plant in cosmetology and the high cost of cosmetic products and the problems of dry skin, we set the goal of extracting oil from the seeds of this plant and manufacture cosmetics namely the cosmetic cream, liquid soap and hard soap from oil extracted from macadamia seeds.
We extracted the oil by the Soxhlet method, and then the oil has been refined in order to be used. From the established formulas, we have manufactured cosmetic products and we followed with the evaluation of quality of our obtained products.
The obtained results in our work showed that macadamia seeds contain a large amount of oil; the yield was good, in the two treated samples (one harvested from Nyamagabe District is equal to 60.88%, the other harvested from Nyaruguru District is to 62.61% ). The cream made was stable, its cost (1,148.27RwF) and quality is like other creams commonly known at the market, finally our soaps (liquid and hard) have good foaming and detergent properties as well as other known commercial detergents on the market, its pH is in the range of standard (the pH is equal to10 for hard soap and the pH is equal to 11 for hard soap), so our products can be used in order to satisfy our need without worry.
To respond to numerous modern challenges, chemistry is evolving in new directions to design “greener” plastics and fuels, monitor atmosphere and oceans to model global warming, determine our genetic makeup to treat disease, and synthesize nanomaterials with revolutionary properties, among many others.
Nevertheless, as the applications change, the basic concepts of chemistry still form the essence of the course. The mass laws and the mole concept still apply to the amounts of substances involved in a reaction. Atomic properties, and the periodic trends and types of bonding derived from them, still determine molecular structure, which in turn still governs the forces between molecules and the resulting physical behavior of substances and mixtures. And the central concepts of kinetics, equilibrium, and thermodynamics still account for the dynamic aspects of chemical change.
The challenge for a modern text surveying this enormous field is to present the core concepts of chemistry clearly and show how they apply to current practice. The first edition of COLLECTION OF ADVANCED LEVEL PRACTICAL CHEMISTRY NATIONAL EXAMINATIONS AND THEIR MARKING SCHEMES will evolve important ways to meet this challenge.
To respond to numerous modern challenges, chemistry is evolving in new directions to design “greener” plastics and fuels, monitor atmosphere and oceans to model global warming, determine our genetic makeup to treat disease, and synthesize nanomaterials with revolutionary properties, among many others.
Nevertheless, as the applications change, the basic concepts of chemistry still form the essence of the course. The mass laws and the mole concept still apply to the amounts of substances involved in a reaction. Atomic properties, and the periodic trends and types of bonding derived from them, still determine molecular structure, which in turn still governs the forces between molecules and the resulting physical behavior of substances and mixtures. And the central concepts of kinetics, equilibrium, and thermodynamics still account for the dynamic aspects of chemical change.
The challenge for a modern text surveying this enormous field is to present the core concepts of chemistry clearly and show how they apply to current practice. The first edition of COLLECTION OF ORDINARY LEVEL CHEMISTRY NATIONAL EXAMINATIONS AND THEIR MARKING SCHEMES will evolve important ways to meet this challenge.
Nevertheless, as the applications change, the basic concepts of chemistry still form the essence of the course. The mass laws and the mole concept still apply to the amounts of substances involved in a reaction. Atomic properties, and the periodic trends and types of bonding derived from them, still determine molecular structure, which in turn still governs the forces between molecules and the resulting physical behavior of substances and mixtures. And the central concepts of kinetics, equilibrium, and thermodynamics still account for the dynamic aspects of chemical change.
The challenge for a modern text surveying this enormous field is to present the core concepts of chemistry clearly and show how they apply to current practice. The first edition of COLLECTION OF ADVANCED LEVEL CHEMISTRY NATIONAL EXAMINATIONS AND THEIR MARKING SCHEMES will evolve important ways to meet this challenge.
After studying this unit "CARBON AND ITS INORGANIC COMPOUNDS" , the learners should be able to relate the properties of carbon and its compounds to its uses and describe how the compounds of carbon are prepared.
Macadamia (Macadamia Tetraphilla) the native plant from Australia is recognized as a source of oil that is very good for the manufacture of various cosmetic products.
Given the importance of this plant in cosmetology and the high cost of cosmetic products and the problems of dry skin, we set the goal of extracting oil from the seeds of this plant and manufacture cosmetics namely the cosmetic cream, liquid soap and hard soap from oil extracted from macadamia seeds.
We extracted the oil by the Soxhlet method, and then the oil has been refined in order to be used. From the established formulas, we have manufactured cosmetic products and we followed with the evaluation of quality of our obtained products.
The obtained results in our work showed that macadamia seeds contain a large amount of oil; the yield was good, in the two treated samples (one harvested from Nyamagabe District is equal to 60.88%, the other harvested from Nyaruguru District is to 62.61% ). The cream made was stable, its cost (1,148.27RwF) and quality is like other creams commonly known at the market, finally our soaps (liquid and hard) have good foaming and detergent properties as well as other known commercial detergents on the market, its pH is in the range of standard (the pH is equal to10 for hard soap and the pH is equal to 11 for hard soap), so our products can be used in order to satisfy our need without worry.