Ablock of aluminum occupies a volume of 15.0 ml and weight 40.5 g. what's the density

What are the 4 phases of matter in order of increasing engery content?

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.

Iwould appreciate if someone could me.