Calcocite is a mineral composed of 79. 9 mass % copper and 20. 1 mass % sulfur. Determine the empirical formula for calcocite.

The graph above shows how the price of cell phones varies with the demand quantity. the equilibrium price for cell phones is where both supply and demand quantities equal $100, 5,000 5,000, $100

Non renewable resources like petroleum eventually

Which one of the following substances would be the most soluble in ccl4? na2so4 h2o ch3ch2ch2ch2oh c4h10 hi