organic (not oxygen)

Question 1

what does the general formula show

Answer 1

describes any member of a family of compounds

Question 2

what does the empirical formula show

Answer 2

simplest whole number ratio of atoms of each element in a compound

Question 3

what does the molecular formula show

Answer 3

the actual number of atoms of each element in a molecule

Question 4

what dies the displayed formula show

Answer 4

how the atoms in a molecule are arranged

Question 5

what does the structural formula show

Answer 5

shows the arrangement of atoms carbon by carbon

Question 6

what is cracking

Answer 6

the splitting up of long chain hydrocarbons

Question 7

what are the properties of long chain hydrocarbons

Answer 7

-high boiling points
-viscous

Question 8

what are the properties of short chain hydrocarbons

Answer 8

-low boiling points
-thin and pale

Question 9

name an example of a short chain hydrocarbon

Answer 9

petrol

Question 10

what does cracking produce

Answer 10

alkenes

Question 11

what are the conditions needed for cracking

Answer 11

600>700 degrees
silica (catalyst)

Question 12

what happens during cracking

Answer 12

-alkene is heated until vaporised
-breaks down when in contact with catalyst
-produces short chain alkanes and alkenes