Agold nugget has a volume of 20.0 cm3 and its density is 19.3 g/cm3. what is the mass of the gold nugget?

Can someone me with these questions plz.

What is the mass of each element in a 324.8 sample of co2

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.