Neco 2025 Chemistry Question 45
Practice objective / multiple choice question 45 from the 2025 Neco Chemistry examination.
Using the apparatus shown, 4.40 g of an unknown carbonate \(M\text{CO}_3\) (where \(M\) is a metal of atomic mass between 20 and 70) is reacted with excess hydrochloric acid. The carbon dioxide produced is collected over water at \(298\) K and \(760\) mmHg; after correcting for the water‑vapour pressure of \(23.8\) mmHg, the dry \(\text{CO}_2\) volume is \(0.860\) L. After the reaction, \(1.00\) g of solid residue remains. Identify the metal \(M\) and give its atomic mass to the nearest whole number.
Answer Options
About This Question
This is Neco 2025 Chemistry Question 45. It is one of the objective questions from the 2025 Neco Chemistry examination.
Difficulty level: Medium .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.