How many atoms are in 2.3 g of na? show your work and these question will take two steps

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?

Which characteristics can be used to differentiate star systems? check all that apply.

Which of the following is not true about the atomic model of substances?