Chemistry Practice Problems Mass Percent Formula Practice Problems Solution: The main source of copper on earth is a mineral ca...

Solution: The main source of copper on earth is a mineral called chalcocite, which is copper(I) sulfide. a)  What is the formula of this compound?  _________ b)  What is the mass percent of copper in this compound?

Problem

The main source of copper on earth is a mineral called chalcocite, which is copper(I) sulfide.

a)  What is the formula of this compound?  _________

b)  What is the mass percent of copper in this compound?