\What is the percent by mass of hydrogen in aspirin, #C_9H_8O_4#?

1 Answer
Kris Caceres
Jan 18, 2016

4.48%

Explanation:

To get the percent by mass of Hydrogen in a compound like aspirin, all you have to do is divide the mass of hydrogen by the molecular mass of aspirin then multiply it to 100%.

Solution:

#C_9H_8O_4 = 180.15 g/[mol]#

#% H = (((8) (1.00794 g/[mol])) /[ 180.15 g/[mol]])*100%#

#% H = 4.48%#

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