mistakes from mock

Question 1

define relative atomic mass

Answer 1

average mass of all of the atoms relative to the 1/12 mass of a carbon atom

Question 2

how do you identify catalysts in an equation

Answer 2

catalysts in a equation are reactants in step 1 and products in step 2 so it is unchanged overall

Question 3

what conditions are needed for catalytic cracking

Answer 3

slight pressure
high temperature

Question 4

what are the products of catalytic cracking

Answer 4

branched alkanes
aromatics

Question 5

why is it easier to break a carbon to bromine bond than a carbon to fluorine bond

Answer 5

as you go down the group
the carbon halogen bond length increases so the bond energy decreases so it is easier to break