Intellectual Olympiad in Physical-Chemical Analysis Methods Laboratory - 2026 ongoing

Subject: Physical-Chemical Analysis Methods Laboratory
Level: IX
Category: student
Quiz questions: in English
Example question: A 0.2500 g sample of a metal alloy is dissolved and diluted to 100.0 mL. A 10.00 mL aliquot is further diluted to 50.00 mL, giving an absorbance of 0.420. The calibration equation is A = 0.0840C, where C is in mg/L. What is the mass of the metal in the original sample? 0.250 mg, 2.50 mg, 25.0 mg, 250 mg