13. Which statement about trace elements in our atmosphere is false? O A. Elements that exists in small amounts in our atmosphere.
B. Elements that make up 1% -4% of our atmosphere.
O C. Elements that make up the 0.1% or less of our atmosphere.
D. Elements that include Methane, Neon, and Helium.

What is the number of moles in 15.0 g ash3?

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?

Ablock of aluminum is dropped into a graduated cylinder with an initial volume of water at 75ml and the volumes rises to 90ml. if the block has a mass of 40.5 g what is its density ?