Question 8 • *26-27 CFISD TX-Chemistry A CR
Use the brand-new balance’s accurate mass, 15.9 grams, as the reference. The old balance differs by |15.6 − 15.9| = 0.3 grams, so the percent error is (0.3 ÷ 15.9) × 100 ≈ 1.89%. The correct choice is 1.89%.
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