Give the correct number of significant figures and units to the problem below. 58.00 mg - 45.22 µg = A) 57.95 mg B) 12.78 mg C) 12.78 µg D) 57.55 µg E) 12.78 mg²

Question

Quizplus · Accepted Answer

The correct answer is 57.95 mg because when converting 45.22 µg to mg (1 µg = 0.001 mg), it becomes 0.04522 mg. Subtracting this from 58.00 mg gives 57.95478 mg, which rounds to 57.95 mg with four significant figures, matching the precision of the original measurements.

Give the Correct Number of Significant Figures and Units to the Problem