CHM 1045- Midterm Exam Guide - Comprehensive Notes for the exam ( 71 pages long!)
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Add or sub: fewer numbers after the decimal. Two or more different elements joined by bonds, fixed composition, pure substance ex. ) Two or more different atoms that are not joined together by a chemical bond, free ex. ) sugar and water, salt and pepper, oil and vinegar. Two substances mix together with no separation ex. ) sugar and water. Two substances separate and do not mix well ex. ) oil and vinegar. New shape, no new substance, change in matter. Atomic mass average: multiply amu by percentage, add both answers together, correct sf. Naming ionic: name metal, name non-metal, switch charges ex. ) Naming polyatomic ions: name metal, name polyatomic ion (table 2. 4) ex. ) Al, zn, ag are defined charges (+3, +2, +1) ex. ) 10. deca (metal)hco3 > (metal)hco3 > (metal)co3+co2+h2o (metal)clo3 > (metal) clo3 > salt +o2 (metal)co3 > (metal)co3 >(metal)o2+co2 (metal)oh > (metal)oh >(metal)o2 +h2o.
