How many elements and atoms are in chalk

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

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.

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?