CHY 103 Chapter Notes - Chapter 1-4: Chemical Equation, Molar Mass, Kilogram
9 Oct 2015
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Precision how close a series of measurements are to one another or how reproducible they are. 1. 60 x 10 19c x 1g/ 1. 76 x 108c = 9. 10 x 10 28 radioactivity emission of small energetic particles from the core of certain unstable atoms. Isotopes atoms with the same number of protons but different numbers of electrons. Chemical formula indicates the elements present in the compound and the relative number of atoms/ions of each (h2o is the chemical formula for water indicating to have a two to one ratio) Charge of chromium must be 3+ for the compound to be can be named chromium(iii). Hydrates contain specific number of water molecules associated with each systematic name is formula unit (epsom salt formula is magnesium sulfate heptahydrate. The molar mass of a compound the mass in grams of 1 mol of its molecules or formula units is numerically equivalent to its formula mass.
