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secondary 4 chevron_right Biology chevron_right Singapore

Hi, I can understand why the answer is C, but why is B not possible? Thanks! #chemistry

Date Posted: 1 year ago
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Pang Wen Ni
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Because when you prepare the set up you turn the cylinder over to submerge it in the water and the gas trapped inside is the air around us. After collection the gas in the cylinder would contain both gas Y and gases present in the air such as oxygen, so it would not be pure gas Y.