__Ca +__ H20- _Ca(OH)2 + _H2 What are the coefficients of the reaction?

2,1,1,2
3,1,1,2
1,2,1,1
2,2,2,1

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.