The petrol fraction is obtained from near the top of the column. The bitumen fraction is obtained from the bottom of the column. Explain how the petrol and bitumen fractions differ in their properties and uses. (6 marks)

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.

What is the chemical formula for a compound between li and br? libr li2br libr2 libr3

Is water wet? if yes or no give a brief explanation.