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Problem of the Week Archive

Collection of all our problem of the week threads.

669 Posts
58 Topics

Last post by Borek
in Re: Chemistry
on October 12, 2019, 04:03:28 AM

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Stoichiometry calculator

Started by Borek | Last post by wildfyr December 31, 2018, 02:39:30 PM

3 Replies
41482 Views
Last post December 31, 2018, 02:39:30 PM
by wildfyr
Где заказать полиграфию?

Started by toongili | Last post by toongili Today at 01:37:03 AM

0 Replies
6 Views
Last post Today at 01:37:03 AM
by toongili
Fractional distillation

Started by JayZiyC | Last post by AWK January 23, 2021, 08:00:16 AM

1 Replies
97 Views
Last post January 23, 2021, 08:00:16 AM
by AWK
How to micronize magnetite powder?

Started by nontony | Last post by nontony October 24, 2020, 03:08:10 PM

0 Replies
107 Views
Last post October 24, 2020, 03:08:10 PM
by nontony
0 Replies
111 Views
Last post December 05, 2020, 11:25:22 AM
by born2dive00
Stable and anhydrous form of waste Na2SO4?

Started by metallurgy | Last post by metallurgy January 06, 2021, 09:26:16 AM

0 Replies
112 Views
Last post January 06, 2021, 09:26:16 AM
by metallurgy
chemsketch : how to use abbreviations like "Ph" "OMe" ecc

Started by xshadow | Last post by xshadow October 05, 2020, 02:52:54 PM

0 Replies
121 Views
Last post October 05, 2020, 02:52:54 PM
by xshadow
0 Replies
124 Views
Last post December 05, 2020, 01:17:49 PM
by Win,odd Dhamnekar
how to predict redox potentials of Fe-Alg complexes?

Started by Petorin | Last post by Petorin October 23, 2020, 07:27:32 AM

0 Replies
126 Views
Last post October 23, 2020, 07:27:32 AM
by Petorin
Question about Organoboranes and their structures

Started by Methanenitrile1 | Last post by Methanenitrile1 January 05, 2021, 11:34:01 AM

0 Replies
126 Views
Last post January 05, 2021, 11:34:01 AM
by Methanenitrile1
Ionization energy: metal transition 1 and 2 series

Started by xshadow | Last post by xshadow January 19, 2021, 03:52:47 PM

0 Replies
131 Views
Last post January 19, 2021, 03:52:47 PM
by xshadow
MOVED: Organic chemistry

Started by sjb | Last post by sjb September 20, 2020, 02:55:19 AM

0 Replies
133 Views
Last post September 20, 2020, 02:55:19 AM
by sjb
Is Methylmercury still in use nowadays?

Started by BubbaDemiri | Last post by BubbaDemiri December 04, 2020, 07:52:03 AM

0 Replies
135 Views
Last post December 04, 2020, 07:52:03 AM
by BubbaDemiri
a Kp problem from an exam

Started by LucaZombini | Last post by LucaZombini September 07, 2020, 04:06:07 AM

0 Replies
137 Views
Last post September 07, 2020, 04:06:07 AM
by LucaZombini
Problem on anodizing stainless steel

Started by vermutung2 | Last post by vermutung2 November 11, 2020, 06:58:21 AM

0 Replies
137 Views
Last post November 11, 2020, 06:58:21 AM
by vermutung2
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