How many moles of potassium ions are present in 1.2 moles of K2SO4?

a. 6.02 x 10^23 moles


b. 0.60 moles


c. 2.4 moles





If you could also explain how you came up with that answer too.


Thanks

How many moles of potassium ions are present in 1.2 moles of K2SO4?
2.4 moles


You have 1.2 moles of K2SO4


Each mole of K2SO4 contains 2 moles of K^+1 and 1 mole of SO4^-2


Substitute "molecule" for "mole" (because 1 mole contains 6.022x10^23 molecules).and it might be easier to see. Perhaps "mole" is what is confusing you.
Reply:Sure. Take a look at the overall molar mass. 158.259 g/mol. Now take a look at the molar mass for K2. It is 78.196 g/mol.





Now set up a proportion,





1.2 mol / 158.259 = x/78.196, cross multiply and solve for x.





x = 0.60,





Your answer is b.