Neco 2017 Chemistry Question 2
Practice objective / multiple choice question 2 from the 2017 Neco Chemistry examination.
A 2.00 L container at 27°C contains a mixture of \(\text{O}_2\) and \(\text{N}_2\) gases at a total pressure of 1.20 atm. The mixture is heated to 57°C, raising the pressure to 1.44 atm. The gas is then passed over heated copper, which reacts with all the \(\text{O}_2\) according to \(2 \text{Cu} + \text{O}_2 \rightarrow 2 \text{CuO}\). After the reaction, the remaining gas (only \(\text{N}_2\)) is measured at 27°C and 1 atm and occupies 0.500 L. Determine the mass of \(\text{O}_2\) originally present in the container.
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About This Question
This is Neco 2017 Chemistry Question 2. It is one of the objective questions from the 2017 Neco Chemistry examination.
Difficulty level: Medium .
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