Is it not reasonable to think that the only gas in the syringe is oxygen? That’s what the question seems to indicate, isn’t it? Is there anything else that is compressible in the syringe? Yet, the answer at the back of this assessment book says:
How on earth do we read the mind of the person who set the question and somehow know that there is carbon dioxide in the syringe? We have to ASSUME, right? And the more we ASSUME, the more we make an ASS out of U and Me. Don’t tell me it’s only “scientific” to be able to guess that the oxygen in the syringe is mixed with carbon dioxide. Hydrogen sulphide can or not ha?