How many micrograms of zinc oxalate (ZnC2O4) should be added to 115.0 mL of water to produce an 8.5 x 10-6 mmol/L zinc oxalate (ZnC2O4) solution?
a) 11.95 μg
b) 23.90 μg
c) 35.85 μg
d) 47.80 μg