How many moles of each substance are needed to prepare the following solutions? 65.0 ml of 9.0 (m/v)% KCl (molecular weight MW=74.55g/mol).
a) 0.486 moles KCl
b) 0.731 moles KCl
c) 0.651 moles KCl
d) 1.215 moles KCl