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(4) 80Air contains 23% oxygen and 77 % nitrogen byweight. The percentage of O, by volume is(3) 60(1) 28.1(2) 20.723.0E(3) 21.8Whon tho tomnoratura of cortain carnl

Answer» (4) 80Air contains 23% oxygen and 77 % nitrogen byweight. The percentage of O, by volume is(3) 60(1) 28.1(2) 20.723.0E(3) 21.8Whon tho tomnoratura of cortain carnl


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