Question

Calculate the number of moles of NaCl contained in 0.500L of a 1.5M solution

Answer 1

mole of Nacl in the solution=molarity x volume divide by 1000
molarity=0.5M
volume=1.5 Liter

that is,
= 0.500 x 1.5 /1000=7.5 x10^-4 moles