Types Of Formula

Question 1

What is the molecular formula?

Answer 1

The formula which gives the actual number of atoms in each element in that one molocule.

Question 2

What is empirical formula?

Answer 2

The simplest ratio of atoms of each element in the compound.

Question 3

What is general formula?

Answer 3

The number of atoms of each element in a compound with n number of carbons.

Question 4

What is a homologous seris?

Answer 4

A series which all have the same general formula, similar chemical properties and a trend in boiling points but a different number of carbon atoms.

Question 5

What is the general formula for alkanes?

Answer 5

Cn H2n+2

Question 6

What is the general formula for alkenes (double bonds)?

Answer 6

Cn H2n

Question 7

What is structural formula?

Answer 7

Shows how many atoms are joined together in a molecule without showing every bond to a C atom.
E.g: CH3CH2CH2CH3

Question 8

How many bonds can each carbon form?

Answer 8

4

Question 9

What is displayed formula?

Answer 9

Shows all bonds and atoms in a molecule.
H H H
I I I
H–C–C–C–H
I I I
H H H

Question 10

What is skeletal formula?

Answer 10

Uses lines to represent bonds so each point is a C atom and bonds to a H atom are not shown.

Question 11

What is the name of the element which contains 1 carbon and 4 hydrogen?

Answer 11

Methane

Question 12

What is the name of the element which contains 2C and 6H?

Answer 12

Ethane

Question 13

What is the name of the element which contains 3C and 8H?

Answer 13

Propane

Question 14

What is the name of an element which contains 4C and 10H?

Answer 14

Butane

Question 15

What is the name of an element which contains 5C and 12H?

Answer 15

Pentane

Question 16

What is the name of the element which contains 6C and 14H?

Answer 16

Hexane