4th Six Weeks

Question 1

hydrate

Answer 1

a compound, typically a crystalline one, in which water molecules are chemically bound to another compound or an element.

Question 2

mole

Answer 2

The mass of substance containing the same number of fundamental units as there are atoms in exactly 12.000 g of 12C. Fundamental units may be atoms, molecules, or formula units, depending on the substance concerned.

Question 3

Avogadro’s Number

Answer 3

6.02*10^23

Question 4

molar mass

Answer 4

the mass of a given substance (chemical element or chemical compound) divided by its amount of substance. The base SI unit for molar mass is kg/mol. However, for historical reasons, molar masses are almost always expressed in g/mol.

Question 5

percent composition

Answer 5

the percentage of a formula mass represented by each element. Percentage composition compares the mass of one part of a substance to the mass of the whole.

Question 6

empirical formula

Answer 6

a formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms; smallest whole number ratio of atoms in a compound

Question 7

molecular formula

Answer 7

a formula giving the number of atoms of each of the elements present in one molecule of a specific compound; a whole number multiple of empirical formula

Question 8

yield

Answer 8

The amount of product obtained in a chemical reaction.

Question 9

Solubility Rules

Answer 9

1. All salts of Group 1A ammonium are soluble.
2. All salts of nitrates, chlorates, and acetates are soluble.
3. All salts of halides are soluble except those of silver (I), copper (I), lead (II), and mercury (I).
4. All salts of sulfate are soluble except for barium sulfate, lead (II) sulfate, and strontium sulfate.
5. All salts of carbonate, phosphate, and sulfite are insoluble, except for those in Group 1A and ammonium.
6. All oxides and hydroxides are insoluble except for those of Group IA, calcium, strontium, and barium.
7. All salts of sulfides are insoluble except for those of Group IA and IIA elements and of ammonium.

Question 10

Methane

Answer 10

CH4

Question 11

C2H6

Answer 11

Ethane

Question 12

Propane

Answer 12

C3H8

Question 13

C4H10

Answer 13

Butane

Question 14

Pentane

Answer 14

C5H12

Question 15

Hexane

Answer 15

C6H14

Question 16

C7H16

Answer 16

Heptane

Question 17

C8H18

Answer 17

Octane

Question 18

Nonane

Answer 18

C9H20

Question 19

Decane

Answer 19

C10H22

Question 20

Synthesis

Answer 20

Chemistry. the forming or building of a more complex substance or compound from elements or simpler compounds.

Question 21

Types of Decomposition

Answer 21

Type 1: Binary Compounds break down to elements
Type 2: Metallic Carbonate -> Metallic Oxide + Carbon Dioxide
Type 3: Metallic Chlorate -> Metallic Chloride + Oxygen
Type 4: Metallic Hydroxide -> Metallic Oxide + Water