How many molecules are in 2.50 moles of co2

In 2002, the rare earth elements mine in mountain pass, california was closed because

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 do dying stars contribute to the formation of planets