How do you find the percent composition of all elements in sulfur trioxide?

1 Answer
anor277
Mar 20, 2017

Well it is simply the quotient, #"mass of component"/"molar mass of compound"xx100%#

Explanation:

And #%S=(32.06*g*mol^-1)/(32.06*g*mol^-1+3xx16.00*g*mol^-1)xx100%#

#=40%#

And what must be #%O# given #%S#?

From where did I get the atomic masses in #g*mol^-1#? Did I simply know them off the top of my head?

Related questions
See all questions in Percent Composition
Impact of this question
4660 views around the world
You can reuse this answer
Creative Commons License