Quiz 1 Preperation Problem #2

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Jazmin Martin 1D
Posts: 19
Joined: Fri Dec 04, 2015 3:00 am

Quiz 1 Preperation Problem #2

Postby Jazmin Martin 1D » Wed Oct 12, 2016 8:56 pm

The question is,

Determine the molecular formula of a compound with the following composition by mass: 18% C, 2.5% H, 63.5% I, x% O, and a molar mass of 400 g/mol.

My question is how do I find the percentage of X.

Do I just add the percentages and subtract from 100%.

Thank you,

Best,
Jazmin

Jocelyn Sandoval 3B
Posts: 26
Joined: Wed Sep 21, 2016 2:59 pm

Re: Quiz 1 Preperation Problem #2

Postby Jocelyn Sandoval 3B » Wed Oct 12, 2016 9:13 pm

Hey Jazmin!
Yes, just add the percentages and subtract from 100% to get X%.

Jazmin Martin 1D
Posts: 19
Joined: Fri Dec 04, 2015 3:00 am

Re: Quiz 1 Preperation Problem #2

Postby Jazmin Martin 1D » Thu Oct 13, 2016 12:14 am

Ok thank you!!!


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