moles of CuNO3 = mass / Molar mass
moles = 7.42 g / 125.56 g/mol = 0.0591 moles
C = n / V
V = n / C
V = 0.0591 mol / 0.150 mol/L = 0.394 L or 394 mL
moles = 7.42 g / 125.56 g/mol = 0.0591 moles
C = n / V
V = n / C
V = 0.0591 mol / 0.150 mol/L = 0.394 L or 394 mL