Neco 2025 Chemistry Question 12
Practice objective / multiple choice question 12 from the 2025 Neco Chemistry examination.
A 12.0 g alloy of zinc and copper is treated with excess dilute \(\mathrm{H_2SO_4}\). Only the zinc reacts, liberating hydrogen gas that is collected over water. The volume of gas measured at 25 °C and 1.00 atm (water vapour pressure 23.8 mm Hg) is 0.85 L. After the reaction, the solution is evaporated to dryness, leaving zinc sulphate crystals weighing 5.00 g. Determine the mass percent of zinc in the original alloy (to three significant figures).
Answer Options
About This Question
This is Neco 2025 Chemistry Question 12. It is one of the objective questions from the 2025 Neco Chemistry examination.
Difficulty level: Hard .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.