Is seeing your breath in the cold air conduction, convection or radiation?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Draw any one of the skeletal structures of a 2° alkyl bromide having the molecular formula of c6h13br and two stereogenic centers. indicate chirality by using wedge and hashed wedge notation. lone pairs do not need to be shown.

Find the missing probability in the table below a.0.10 b.40 c.0.80 d. 0.20