In an organic compound of molar mas...
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In an organic compound of molar mass 108 g mol-C, H and N atoms are present in 9: 1:3.5 by weight. Molecular formula can be : (AIEEE 2002, 3/225) (1) CsHBN2 (2) C7H10N (3) CsH6N3 (4) C4H18N3

JEE/Engineering Exams
Chemistry
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Molar mass of compound = 108 grams Total part by weight ( =9+1+3.5=13.5 ) Weight of carbon ( =left(9^{*} 108right) / 13.5=72 mathrm{g} ) Number of carbon atoms ( =72 / 12=6 ) Weight of hydrogen ( =left(1^{*} 108right) / 13.5=8 mathrm{g} ) Number of hydrogen atoms ( =8 / 1=8 ) Weight of nitrogen ( =left(3.5^{*} 108right) / 13.5=28 mathrm{g} ) Number of nitrogen atoms ( =28 / 14=2 ) Hence, molecular formula is C6H8N2
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