1
Chemistry Exam 2 - Study Guide
Questions and Answers (100%
Correct Answers) Already Graded A+
describe the difference between structural formulas and
molecular formulas Ans: molecular formulas list out the
© 2026 Assignment
different atoms and how many of each there are. Structural
formulas show how the atoms are connected together
Guru01 - Stuvia
describe the HONC 1234 Rule and how it helps when
Expert
determining structural formulas Ans: H=hydrogen=1 bond;
O=oxygen=2 bonds; N=nitrogen=3 bonds; C=carbon=4 bonds
describe the Octet Rule and how it helps when determining
Lewis Structures Ans: atoms share electrons in Lewis
Structures so that the atoms obtain a stable configuration with
8 valence electrons
H2O Ans: dihydrogen monoxide
PCl3 Ans: phosphorus trichloride
CBr4 Ans: carbon tetrabromide
C2N2 Ans: dicarbon dinitride
describe the Electron Domain Theory (aka: VSEPR Theory). How
is it connected to molecular shapes? Ans: used to predict the
shape of a molecule based on electron domains (areas of
electron density) around a central atom
Chemistry Exam 2 - Study Guide
Questions and Answers (100%
Correct Answers) Already Graded A+
describe the difference between structural formulas and
molecular formulas Ans: molecular formulas list out the
© 2026 Assignment
different atoms and how many of each there are. Structural
formulas show how the atoms are connected together
Guru01 - Stuvia
describe the HONC 1234 Rule and how it helps when
Expert
determining structural formulas Ans: H=hydrogen=1 bond;
O=oxygen=2 bonds; N=nitrogen=3 bonds; C=carbon=4 bonds
describe the Octet Rule and how it helps when determining
Lewis Structures Ans: atoms share electrons in Lewis
Structures so that the atoms obtain a stable configuration with
8 valence electrons
H2O Ans: dihydrogen monoxide
PCl3 Ans: phosphorus trichloride
CBr4 Ans: carbon tetrabromide
C2N2 Ans: dicarbon dinitride
describe the Electron Domain Theory (aka: VSEPR Theory). How
is it connected to molecular shapes? Ans: used to predict the
shape of a molecule based on electron domains (areas of
electron density) around a central atom
