CHEMISTRY · Subjective · A Level · Chemistry · Amount of substance · Amount of substance
Problem
How many moles of ammonium sulfate, (NH₄)₂SO₄, are present in 5.00 × 10² mg of the compound? Express your answer in scientific notation with three significant figures.
Atomic masses: N 14.01, H 1.008, S 32.07, O 16.00 (u).