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Elements of life.
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| Submitted: Tue Oct 14 2003
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Terminology (Including Scientific International Units) Atom: Smallest whole particle, can not be broken down in a chemical reaction Molecule: Two or more atoms covalently bonded Balanced Equation: Same number of each atom on each side, since in a closed system, according to the Law of Conservation of Mass, the total mass is the same after a chemical reaction as before, equations must balance Empirical formula: Simplest ratio of types of atoms in substance e.g. CH2(ethene.) In an equation, oxygen is calculated by the difference. Molecular formula: Actual numbers of different types of atom e.g. C2H4 (ethene) Structural formula: Shows how the atoms are arranged H-O-H 1 dm3 = 1 litre = 1000cm3 10ml = 1cl Moles 1 mol: Quantity of particles ( Avagadro constant (L) = no. atoms in 12g of Carbon12 isotope 1 mol = 6.023 x 1023 mol-1 ) 1 mol dm -3 = 1 mole of substance in something else e.g. 1M HCl in Water Relative Atomic...
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