A chemist added 375 mL of 4.2 x 10^-3 mM silver(II) oxide, AgO, solution to a flask. Determine the mass in micrograms of AgO the chemist has added to the flask. Express your answer to 2 sig figs.

• A. 195 μg
• B. 1387 μg
• C. 1.9 x 10² μg
• D. 1.4 x 10³ μg

Answer: (C)