Atoms & Reactions 0.0 / 5 ? ChemistryAtoms & ReactionsASOCR Created by: fjhcabCreated on: 20-03-16 18:05 Isotope Atoms with the same number of protons but different number of neutrons 1 of 42 Relative Atomic Mass, Ar Mean mass of an atom of an element , compared to 1/12th of the mass of carbon-12 2 of 42 Relative Isotopic Mass Mass of an atom of an isotope compared with 1/12th of the mass of an atom of carbon-12 3 of 42 Relative Molecular Mass, Mr Average mass of a molecule or formula unit, compared to 1/12th of the mass of carbon-12 4 of 42 Isotopic Abundances 1) Multiply each relative isotopic mass by its percentage relative isotopic abundance & add up results 2) Divide by 100 5 of 42 Mass Spectrometry about Isotopes 1)Multiply each relative isotopic mass by its relative isotopic abundance & add it up 2) Divide by sum of abundances 6 of 42 Number of Moles (Avogadro Constant) Number of particles you have / Number of particles in a mole 7 of 42 Number of Moles Mass of substance / Molar mass 8 of 42 Number of Moles (Gas) Volume in dm3 / Molar gas volume 9 of 42 Ideal Gas Equation pV=nRT 10 of 42 Molecular Formula Actual number of atoms of each type of element in a molecule 11 of 42 Empirical Formula Smallest whole number ratio of atoms of each element in a compond 12 of 42 Nitrate NO3^- 13 of 42 Carbonate CO3^2- 14 of 42 Sulfate SO4^2- 15 of 42 Hydroxide OH- 16 of 42 Ammonium NH4^+ 17 of 42 Zinc Ion Zn^2+ 18 of 42 Silver Ion Ag+ 19 of 42 Acids Proton donors. Produce H+ inos in an aqueous solution 20 of 42 Bases Proton acceptors. Grab H+ ions 21 of 42 Alkalis Bases that are soluble in water. Produce OH- ions in an aqueous solution 22 of 42 Metal + Acid Produces Metal Salt + Hydrogen 23 of 42 Metal Oxide + Acid Produces Salt + Water 24 of 42 Metal Hydroxide + Acid Produces Salt + Water 25 of 42 Metal Carbonate + Acid Produces Metal Salt + Carbon Dioxide + Water 26 of 42 Ammonia + Acid Produces Ammonia salt 27 of 42 (Titrations Indicators) Methyl Orange Turns yellow to red 28 of 42 (Titrations Indicators) Phenolphthalein Turns pink to colourless 29 of 42 Number of Moles (Titrations) Concentration x volume (cm3) / 1000 30 of 42 Number of Moles (Titrations) Concentration x volume (dm3) 31 of 42 Percentage Yield (Actual Yield / Theoretical Yield) x 100 32 of 42 Atom Economy (molecular mass of desired product / sum of molecular masses of all product) x 100 33 of 42 Reduction Gain of electrons 34 of 42 Oxidation Loss of electrons 35 of 42 Uncombined Element (C, Na) Oxidation Number: 0 36 of 42 Combined Element (H2O) Oxidation Number: -2 37 of 42 Combined Oxygen in Peroxides (H2O2) Oxidation Number: -1 38 of 42 Combined Hydrogen (NH3) Oxidation Number: +1 39 of 42 Combined Hydrogen in Metal Hydrides (LiH) Oxidation Number: -1 40 of 42 Simple Ions (Na+, Mg2+) Oxidation Number: Charge on ion 41 of 42 Combined Fluorine (NaF) Oxidation Number: -1 42 of 42
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