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What is the percentage of carbon in urea? (Atomic mass C = 12, H = 1, N = 14, O = 16)A. 0.2B. 0.266C. 0.0667D. 0.46 |
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Answer» Correct Answer - A Molar mass of urea (i.e. `NH_(2)CONH_(2)`) `=2xx`atomic mass of N+4`xx`atomic mass of H+1`xx`atomic mass of O+1`xx` atomic mass of C. `=2xx14+4xx1+1xx16+1xx12=60` g As we know that, Percentage or mass % of an element `=("Mass of that element in the compound")/("Molar mass of the compound")xx100` `therefore` Percentage of C=`(1xx12)/60xx100=20%` |
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