2.5 Stoichiometry and Equations Stoichiometry Stoichiometry is the proportion of things either reacting or combining In compounds, it refers to the ratio in which the atoms are combined For example, water, H2O has a stoichiometry of 2 hydrogen to 1 oxygen. It also...
2.3 Amount of Substance The mole and the Avogadro's constant A mole of a substance is the amount of substance that contains the same amount of stated elementary units as there are atoms in 12 g of C-12. The number of atoms is 12 g of C-12 is 6.02 x 10²³...
2.4 Empirical Formula and Molecular Formula Percentage composition by mass Empirical formula Empirical formula is a chemical formula that shows the simplest ratio of the atoms that combine to form a molecule Steps to find empirical formula: Find the mass of...
2.2 Mass Spectrometer What is mass spectrometer? A mass spectrometer is used to determine: relative isotopic mass relative abundance of isotopes relative atomic mass relative molecular mass structural formula of compounds Determination of relative atomic...
2.1 Mass of Atoms and Molecules Concept of relative mass Relative mass is an indication of how heavy is an atom compared to another atom which is used as a standard Relative mass is expressed in atomic mass unit(a.m.u). C-12 was chosen to be the standard model...
Mass of Atoms and Molecules Mass Spectrometer Amount of Substance Empirical Formula and Molecular Formula Stoichiometry and Equations Learning outcomes: define and use the terms relative atomic, isotopic, molecular and formula masses, based on the C-12 define and...