PDF4PRO ⚡AMP

Modern search engine that looking for books and documents around the web

Example: tourism industry

Tutorial 2 FORMULAS, PERCENTAGE COMPOSITION, AND …

T-6 Tutorial 2 FORMULAS, PERCENTAGE COMPOSITION, AND THE MOLEFORMULAS: A chemical formula shows the elemental composition of a substance: thechemical symbols show what elements are present and the numerical subscripts show howmany atoms of each element there are in a formula unit. Examples:NaCl: one sodium atom, one chlorine atom in a formula unitCaCl2: one calcium atom, two chlorine atoms in a formula unitMg3N2: three magnesium atoms, two nitrogen atoms in a formula unitThe presence of a metal in a chemical formula indicates an ionic compound, which is composedof positive ions (cations) and negative ions (anions). A formula with only nonmetals indicates amolecular compound (unless it is an ammonium, NH4+, compound). Only ionic compounds areconsidered in this are tables of common ions in your lecture text, p 56 (cations) and p 57 (anions).

We now have two sets of numbers which show mass relationships among the elements in sodium sulfate: (1) the formula mass and (2) the percentage composition. From the formula mass on page T-9 various mass ratios, that is, conversion factors, may be obtained: 45.98 g Na 142.04 lbs Na 2SO 4 32.06 g S

Loading..

Tags:

  Number, Formula, Tutorials, Compositions, Percentages, Tutorial 2 formulas, Percentage composition

Information

Domain:

Source:

Link to this page:

Please notify us if you found a problem with this document:

Spam in document Broken preview Other abuse

Transcription of Tutorial 2 FORMULAS, PERCENTAGE COMPOSITION, AND …

Related search queries