How do chemical properties of artificial sweetners contribute to the function of the synthetic material?

What is a property of a double replacement reaction

If two atoms are bonded to a central atom with no lone pairs,how will they be arranged

Achemist 16 drop copper metal from copper chloride solution. the chemist place is 0.50 g of aluminum foil in a solution containing 0.75 g of copper (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction?