9 23 When heated with chlorine, the hydrocarbon 2,2-dimethylbutane undergoes free radical
substitution.
In a propagation step a free radical X. is formed.
CH3
CH, CH, -C-CH3 + Cl• → X• + HCI
N
CHE
How many different structures of X• are possible?
A 2
B 3
C 4
D 5

1. they vary with a higher number because boiling is way hotter than melting

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?