Answer: 0.4 moles
Explanation:
Given that,
Amount of moles of NaCl (n) = ?
Volume of Nacl solution (v) = 1.25 L
Concentration of NaCl solution (c) = 0.330 M
Since concentration (c) is obtained by dividing the amount of solute dissolved by the volume of solvent, hence
c = n / v
Make n the subject formula
n = c x v
n = 0.330 M x 1.25 L
n = 0.4125 moles (To 2 significant figures, n becomes 0.4 moles)
Thus, 0.4 moles of NaCl are in 1.25 L of a 0.330 M NaCl solution
