Exam 2 Preparation Fall 2021 1 Memorize polyatomic ions 2 Nomenclature on the exam will have a similar format to the questions in the exercises a Names and formulas for cations b Names and formulas for anions c Names and formulas for binary ionic compounds d Names and formulas for binary molecular compounds e Names and formulas for ionic compounds with polyatomic ions f Names and formulas for acids 3 Molar mass and percent composition a Calculate molar mass b Calculate composition of an element in a compound c Determine an empirical formula from a composition d Convert mass to moles and moles to mass e Convert moles to molecules or formula units and molecules or formula units to moles Convert mass to molecules or formula units and molecules or formula units to mass f g Convert moles to atoms h Convert mass to atoms 4 Review a Octet rule i For ions ii For covalent bonding b Bonding i Single bonds ii Double bonds iii Triple bonds c Electronegativity Polarity i Electronegativity definition ii Electronegativity difference and polarity d Rules for drawing Lewis structures e Drawing Lewis structures f Resonance i Definition ii Draw resonance structures 5 Review a VSEPR i Definition ii Electronic geometry iii Molecular geometry iv Bond angles b Molecular polarity c Valence Bond Theory Hybridization d Sigma Pi Bonds
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