Mass Composition

Moderators: Chem_Mod, Chem_Admin

katherinemurk 2B
Posts: 68
Joined: Wed Nov 15, 2017 3:02 am

Mass Composition

Postby katherinemurk 2B » Sat Nov 03, 2018 12:09 am

Okay so there are many questions that give you the mass composition of each element in a compound and ask to find the empirical or molecular formula. The percentage of each element adds up to a 100%. What if they did not add up to 100%, how we would go about solving the problem??

Samantha Chang 2K
Posts: 69
Joined: Fri Sep 28, 2018 12:17 am

Re: Mass Composition

Postby Samantha Chang 2K » Sat Nov 03, 2018 12:11 am

The mass composition percentage has to add up to 100%.

Chloe Likwong 2K
Posts: 70
Joined: Fri Sep 28, 2018 12:23 am

Re: Mass Composition

Postby Chloe Likwong 2K » Sat Nov 03, 2018 1:45 am

The mass composition has to add up to 100% or else you would not be able to do the problem.

Leela_Mohan3L
Posts: 44
Joined: Fri Sep 28, 2018 12:26 am

Re: Mass Composition

Postby Leela_Mohan3L » Sat Nov 03, 2018 10:13 am

If the mass composition doesn't add up to 100% then that is an indication that there is another element present in the compound. Depending on the problem, you would be able to tell which element is missing. Ex: if the problem was asking you to find the molecular formula of a compound that was burned, the missing element might be oxygen.


Return to “Empirical & Molecular Formulas”

Who is online

Users browsing this forum: No registered users and 0 guests