T Kelvin (k) Current I Ampere (A) Amt. substance mol mole 6.02 x 10 23 (molecules) Luminous intensity - candela (c d) MULTIPLES AND SUBMULTIPLES Multiples are larger than the base units and submultiples are smaller than the base units Multiples
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dense as water and of about the same viscosity, chloroform has a heavy, etherlike odor and a burning sweetness of taste, being about 40 times as sweet as cane sugar” (Chloroform, 2016). In addition, “it is an important solvent for gums, resins, fats, elements such as sulfur and iodine, and a wide variety of organic compounds” (Chloroform, 2016). Chloroform is related to human health because, “it was first used as an anesthetic in 1847 in one of the earliest experiments on surgical anesthesia” (Chloroform
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either has a healthy or unhealthy impact on the body. The nutrients found in our diets are essential for the development and maintenance of biological functions that are necessary for sustaining life. Nutrients are the fundamental elements or chemical substances that makeup the foods we eat and they are affected differently by the various biological processes in the body (Mosby's Medical Dictionary). Together, they give food theirs their distinct color, flavor and texture (Tull) There
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crust and its oceans.[1] The realm of geochemistry extends beyond the Earth, encompassing the entire Solar System * Photochemistry, a sub-discipline of chemistry, is the study of chemical reactions that proceed with the absorption of light by atoms or molecules. * Quantum chemistry is a branch
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© ABB - 1 11/11/2003 Henry Buijs IR Spectroscopy and FTIR Molecular Vibrations Material is made up of atoms © ABB Inc. - 2 - A group of atoms linked together by chemical bonds is called a molecule Atoms of hydrogen and oxygen Molecule of water Molecular Vibrations The atoms of a molecule are always in motion © ABB Inc. - 3 - These motions are called vibrations symmetrical vibration H-O-H asymmetrical vibration H-O-H Properties of Molecular Vibrations
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Isotopes are variants of atoms of a particular chemical element, which have differing numbers of neutrons. Atoms of a particular element by definition must contain the same number of protons but may have a distinct number of neutrons which differs from atom to atom, without changing the designation of the atom as a particular element. The number of nucleons (protons and neutrons) in the nucleus, known as the mass number, is not the same for two isotopes of any element. Components of nucleic acid
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structure and bonding of the carbon skeleton into three groups: alkanes, alkenes, and alkynes. Alkanes, or saturated hydrocarbons, are compounds that consist entirely of single bonds, so that each carbon atom is connected to four other atoms (either another carbon within the skeletal structure or a hydrogen atom). They can be described by the formula CnH2n+2. One simple example is methane, where n=1 and therefore
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Question bank 1 mark questions 1. What is the valence shell electronic configuration of p-block elements ? Valence shell electronic configuration is ns2np1-6 2. What is Chile salt petre?/ Indian salt Petre ? Chile saltpeter is NaNO3(sodium nitrate) and Indian salt petre is KNO3(postassium nitrate) 3. What is fluorapatite ? The formula of fluorapatite is Ca9(PO4)6.CaF2. It is a mineral of phosphorous 4. What is the covalence of nitrogen in N2O5? 4 5. What is the basicity
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1. Give an everyday example that illustrates the difference between acceleration and velocity. Give an example of uniform and accelerated motion. An everyday example of the difference between acceleration and uniform motion would be for acceleration driving a car down a long straight road, the speedometer is not moving, the needle is on 40 mph, your moving at a constant speed, but the needle isn’t stationary on the speedometer scale because maybe your foot is either on the gas or brake and your
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formation of hydrogen. Neutral atoms, molecules, charged ions and charged electrons compose interstellar gas. Interstellar dust particles at small and are approximately the length of blue wavelengths, which are 450-495 nm (nanometer). These participles have no strict shape and are composed of ice, silicates, carbon and may contain iron compounds. Interstellar dust clouds have clumped together over a span of millions of years and this cloud is composed of many different elements and mixtures. Some of these
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