Which system does not allow for matter or energy to be exchanged outside the system?

isolated systems

open system

all systems

closed system

If 200.0g of copper(ll) sulfate react with an excess of zinc metal, what is the theoretical yield of copper

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

Match the name of the following compound:   mgso4  · h2omagnesium sulfate monohydratemagnesium (ii) sulfate monohydratemagnesium (ii) sulfate hydratemagnesium sulfate hydrate