4.0
crude oil contains a mixture of hydrocarbons.
the table below shows the relative market demand and available supply of each
fraction.
boiling point
fraction
relative %
supply
in crude oil
relative %
demand
in °c
less than 30
2
30-160
15
liquid petroleum
gas
gasoline (petrol)
kerosene
kparaffin)
diesel
fuel and heavy
160-250
10
20
220-350
greater than
350
53
20
oils
4.1
describe how fractional distillation and cracking are used so that sufficient petrol is
produced from crude oil to meet demand.
use the information in the table, and your own knowledge.
[6 marks]

idk

explanation:

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

dynamic equilibrium is the answer.