You need to make a stock solution of a known copper concentration for your experiment. You start by weighing out a piece of pure copper wire which has a mass of 0.248 g. You then add 1.0 mL of 12 M HNO3, 3.0 mL of H2O and 2.0 mL of 12 M NH4OH to dissolve the copper metal.
(a) How many moles of copper are in the solution?
WebAssign will check your answer for the correct number of significant figures.

Question

You need to make a stock solution of a known copper concentration for your experiment. You start by weighing out a piece of pure copper wire which has a mass of 0.248 g. You then add 1.0 mL of 12 M HNO3, 3.0 mL of H2O and 2.0 mL of 12 M NH4OH to dissolve the copper metal.
(a) How many moles of copper are in the solution?
WebAssign will check your answer for the correct number of significant figures.

jfraser · Answer

assuming all the copper wire reacts, take that mass of copper wire and convert it to moles using the molar mass of copper