Saturday, February 18, 2012

How to calculate the percentage of oxygen in the compound (C8H9O2N)?

the numbers in the compound are atoms.

its the molecular formula of acetaminophen active ingredient in tylenol

i have to give the answer in three significant figuresHow to calculate the percentage of oxygen in the compound (C8H9O2N)?
C8H9O2N

Mol.mass = 96 + 9 + 32 + 14 = 151

O2 = 32

32/151 = 0.2119 = 21.19% = 21.2% O2.How to calculate the percentage of oxygen in the compound (C8H9O2N)?
Find atomic weight of one molecule of the entire compound then the percentage oxygen is:



weight of oxygen in one molecule divided by total weight of one moleculeHow to calculate the percentage of oxygen in the compound (C8H9O2N)?
take the atomic mass of O and divide it by the entire mass of the compound



32/151= 0.211



multiply by 100=21.1%



the answer is 21.1 % of O

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