can someone pls check if this is right:
3.78 x 10^-5 mol/L is the diluted
3.78 x 10^-4 mol/L is the undiluted
Then since there's 50mL, 3.78 x 10^-4 x (50 x 10^-3) moles
=0.0000189 moles
0.0000189 mol x 500.158 g/mol = 0.0094529 g
So, 0.0094529/5
= 0.189%