molar masses on the test

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Kassidy Tran 1E
Posts: 77
Joined: Fri Sep 28, 2018 12:15 am

molar masses on the test

Postby Kassidy Tran 1E » Tue Oct 09, 2018 11:26 pm

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.

Iris Bai 2K
Posts: 60
Joined: Fri Sep 28, 2018 12:18 am

Re: molar masses on the test

Postby Iris Bai 2K » Wed Oct 10, 2018 12:13 am

We're given a periodic table, so all the molar masses should be on there.

Noh_Jasmine_1J
Posts: 71
Joined: Fri Sep 28, 2018 12:15 am

Re: molar masses on the test

Postby Noh_Jasmine_1J » Thu Oct 11, 2018 4:13 pm

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

Albert_Luu3K
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

Re: molar masses on the test

Postby Albert_Luu3K » Thu Oct 11, 2018 10:43 pm

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.

Kyither Min 2K
Posts: 60
Joined: Wed Oct 03, 2018 12:15 am

Re: molar masses on the test

Postby Kyither Min 2K » Fri Oct 12, 2018 3:29 pm

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.

whitney_2C
Posts: 74
Joined: Fri Sep 28, 2018 12:28 am

Re: molar masses on the test

Postby whitney_2C » Fri Oct 12, 2018 4:18 pm

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.

Andrewwiner4D
Posts: 32
Joined: Fri Sep 28, 2018 12:28 am

Re: molar masses on the test

Postby Andrewwiner4D » Fri Oct 12, 2018 5:28 pm

You will be provided a periodic table but will have to calculate molar masses on molecules.

Andrewwiner4D
Posts: 32
Joined: Fri Sep 28, 2018 12:28 am

Re: molar masses on the test

Postby Andrewwiner4D » Fri Oct 12, 2018 5:28 pm

That reply is by Andrew Winer (4D).^^^


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