A0.1090 g sample of copper metal is dissolved in 60. ml of concentrated hno3 to form cu2+ ions and then water is added to make a total volume of 203.1 ml. (calculate the molarity of cu2+.)

Mass of Copper metal dissolved = 0.1090 g

Moles of Copper dissolved =

Total volume of the solution = 203.1 mL

Calculating the molarity of copper ions in the solution:

Molarity of a solution =

=

=0.00845 mol/L

Therefore the molarity of copper ions is 0.00845 mol/L

c, liquids evaporate, creating a gas

the answer is d. matter from the air combined with the steel wool.