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Problem of the Week Archive

Collection of all our problem of the week threads.

670 Posts
59 Topics

Last post by wildfyr
in MOVED: Synthesis of N-Ac...
on January 04, 2020, 11:44:41 AM

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Stoichiometry calculator

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

3 Replies
38675 Views
Last post December 31, 2018, 02:39:30 PM
by wildfyr
Why are polymers more prone to creep than metals?

Started by fahadii | Last post by fahadii April 25, 2009, 02:14:24 AM

0 Replies
1891 Views
Last post April 25, 2009, 02:14:24 AM
by fahadii
Themodynamics question

Started by leve | Last post by leve April 25, 2009, 03:47:22 PM

0 Replies
1998 Views
Last post April 25, 2009, 03:47:22 PM
by leve
Phase Diagrams

Started by zirconian | Last post by zirconian May 06, 2009, 05:08:01 AM

0 Replies
1588 Views
Last post May 06, 2009, 05:08:01 AM
by zirconian
Help With Children's Substance

Started by libits | Last post by libits May 10, 2009, 10:08:47 PM

0 Replies
1684 Views
Last post May 10, 2009, 10:08:47 PM
by libits
Determination of COD using Open reflux method

Started by patski | Last post by patski May 13, 2009, 03:53:07 AM

0 Replies
5796 Views
Last post May 13, 2009, 03:53:07 AM
by patski
Levels due to the paschen-back effect

Started by Rioting_Pacifist | Last post by Rioting_Pacifist May 13, 2009, 01:15:40 PM

0 Replies
2146 Views
Last post May 13, 2009, 01:15:40 PM
by Rioting_Pacifist
Rusting of iron nail

Started by skyranger | Last post by skyranger May 14, 2009, 10:48:40 AM

0 Replies
2832 Views
Last post May 14, 2009, 10:48:40 AM
by skyranger
amount ferroin of in Belousov-Zhabotinsky reaction

Started by h8adfh98 | Last post by h8adfh98 May 14, 2009, 04:22:34 PM

0 Replies
1711 Views
Last post May 14, 2009, 04:22:34 PM
by h8adfh98
Types of Flow in Pharmaceuticals

Started by boostar | Last post by boostar May 24, 2009, 05:56:34 AM

0 Replies
2207 Views
Last post May 24, 2009, 05:56:34 AM
by boostar
trans-dichloroethene

Started by wee__ally1 | Last post by wee__ally1 May 24, 2009, 08:53:36 AM

0 Replies
2503 Views
Last post May 24, 2009, 08:53:36 AM
by wee__ally1
quick help please on organometallic chemistry,

Started by rogue_chapatti | Last post by rogue_chapatti May 28, 2009, 10:15:11 AM

0 Replies
1928 Views
Last post May 28, 2009, 10:15:11 AM
by rogue_chapatti
Ways for estimation of glucose and glycerol?

Started by lonesurvivor | Last post by lonesurvivor June 05, 2009, 09:30:42 AM

0 Replies
2276 Views
Last post June 05, 2009, 09:30:42 AM
by lonesurvivor
periodic table beyond the seventh period

Started by hackett | Last post by hackett June 07, 2009, 02:01:05 PM

0 Replies
2031 Views
Last post June 07, 2009, 02:01:05 PM
by hackett
The preparation of PbI2 from Galena (PbS)

Started by Oblihatni | Last post by Oblihatni June 07, 2009, 02:10:24 PM

0 Replies
5369 Views
Last post June 07, 2009, 02:10:24 PM
by Oblihatni
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