Hi guys,here is my question. What is the Concentration of Na2CO3 when it dissolves in a solution and forms a volume of 100 cubic cm?
I found moles using mass/atomic mass of Na2+C+03.
Then i used moles/volume to calculate concentration. Correct?
How many Gold atoms are in Gold mass of 2.5g? 15 percent of the mass is pure Gold.
So first i found 15 percent of the mass which i used to calculate the number of moles. Then i multiplied the moles by Avogadros number to give me the atoms. Anyone help