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molar masses on the test

Posted: Tue Oct 09, 2018 11:26 pm
by Kassidy Tran 1E
Will we be given the molar mass of elements on the exam? or will we have to memorize the molar masses of the elements? I noticed that in the module assessments we were given the molar mass for some of the elements, but not all.

Re: molar masses on the test

Posted: Wed Oct 10, 2018 12:13 am
by Iris Bai 2K
We're given a periodic table, so all the molar masses should be on there.

Re: molar masses on the test

Posted: Thu Oct 11, 2018 4:13 pm
by Noh_Jasmine_1J
You can solve for the molar mass if the question gives you the chemical formula because there is a periodic table given for the test

Re: molar masses on the test

Posted: Thu Oct 11, 2018 10:43 pm
by Albert_Luu3K
Even though we'll be given molar masses from the periodic table, it doesn't hurt to memorize some of the more common elements! After doing a whole bunch of practice problems, molar masses of common elements used will just be ingrained in your memory. Oxygen, Carbon, Hydrogen, and Nitrogen are nice ones to remember, so you won't have to go back and forth between the periodic table and your test.

Re: molar masses on the test

Posted: Fri Oct 12, 2018 3:29 pm
by Kyither Min 2K
You'd typically will have to solve for molar mass which you can do by analyzing the molecule and seeing how many of each element there is, and referencing the periodic table, you can solve for molar mass.

Re: molar masses on the test

Posted: Fri Oct 12, 2018 4:18 pm
by whitney_2C
You'll also find that after doing chemistry for a while you'll just naturally memorize the molar masses of elements and compounds. After doing IB chemistry I had the molar masses of carbon, nitrogen, water, hydrogen, sodium hydroxide, and many more memorized without having to even study them because we used them so much, so don't fret over memorization.

Re: molar masses on the test

Posted: Fri Oct 12, 2018 5:28 pm
by Andrewwiner4D
You will be provided a periodic table but will have to calculate molar masses on molecules.

Re: molar masses on the test

Posted: Fri Oct 12, 2018 5:28 pm
by Andrewwiner4D
That reply is by Andrew Winer (4D).^^^