Chem 141 exam #2

Question 1

Chemical Nomenclature

Answer 1

the system by which substances are named

Question 2

IUPAC

Answer 2

International Union of Pure and Applied Chemistry

( committee that recommends names of substances)

Question 3

Diatomic Molecules

Answer 3

7 elements that occur as two atom molecules

Hydrogen —-H₂

Nitrogen—N₂

Fluorine—F₂

Oxygen—O₂

Iodine—I₂

Chlorine—Cl₂

Bromine—Br₂

Question 4

Diatomic Phrase

Answer 4

Have No Fear Of Ice Cold Beer

Question 5

Polyatomic Molecules

Answer 5

2 elements with many atoms

Phosphorus—P₄

Sulfur—S_{<strong>8</strong>}

Question 6

Ionic Compound

Answer 6

combinatation of cations and anions that form a electrically neutral crystalline solid

Question 7

hydrate

Answer 7

solid compound that includes water molecules in its crystal structure

Question 8

naming ionic compounds

Answer 8

name of that cation (w/o word ion) followed by the name of the anion with its specific anion name ending

Question 9

anhydrous

Answer 9

no water in compound

Question 10

1 ml=

Answer 10

1 cm³

Question 11

Binary molecular compound

Answer 11

formed by two nonmetals or a metalloid and a nonmetal

►this is where you indicate # of molecules with prefixes,second element ends in -ide

PCl₅= Phosphorus pentachloride

SF₆= Sulfur Hexafluoride

Question 12

Molecular Mass

Answer 12

Sum of the atomic masses that make up the molecule

Question 13

Formula Mass

Answer 13

The mass of one formula unit of any compound, must be used for ionic compounds

Question 14

Molar Mass

Answer 14

mass in grams of one mol of a substance

Question 15

Empirical Formula

Answer 15

lowest whole number ratio of atoms of a element in a compound