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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
35244 Views
Last post December 31, 2018, 02:39:30 PM
by wildfyr
H+ Concentration

Started by Cstarman49 | Last post by Cstarman49 Yesterday at 09:12:36 PM

0 Replies
25 Views
Last post Yesterday at 09:12:36 PM
by Cstarman49
Difference between corrosion and battery

Started by VUBstudent | Last post by VUBstudent Yesterday at 12:58:09 PM

2 Replies
66 Views
Last post Yesterday at 12:58:09 PM
by VUBstudent
Фильм 2020 *Ignore me, I am a worthless spammer* онлайн

Started by Brianvom | Last post by Brianvom January 21, 2020, 07:52:21 PM

0 Replies
43 Views
Last post January 21, 2020, 07:52:21 PM
by Brianvom
MOVED: How to remove the protective group

Started by wildfyr | Last post by wildfyr January 21, 2020, 05:38:22 PM

0 Replies
57 Views
Last post January 21, 2020, 05:38:22 PM
by wildfyr
Bonding question

Started by 38175425 | Last post by Enthalpy January 21, 2020, 05:51:03 AM

1 Replies
68 Views
Last post January 21, 2020, 05:51:03 AM
by Enthalpy
Identity of unknown gas.

Started by humanjoj27 | Last post by AWK January 19, 2020, 02:13:50 AM

3 Replies
168 Views
Last post January 19, 2020, 02:13:50 AM
by AWK
Percent by Volume of/in Air

Started by bfl27 | Last post by MNIO January 16, 2020, 12:33:32 PM

1 Replies
117 Views
Last post January 16, 2020, 12:33:32 PM
by MNIO
Half-life

Started by 38175425 | Last post by Corribus January 16, 2020, 11:38:10 AM

6 Replies
229 Views
Last post January 16, 2020, 11:38:10 AM
by Corribus
Relative atomic mass problems

Started by 38175425 | Last post by Enthalpy January 16, 2020, 11:20:33 AM

2 Replies
132 Views
Last post January 16, 2020, 11:20:33 AM
by Enthalpy
London Dispersion Forces in Polar Molecules

Started by Lamda | Last post by Enthalpy January 15, 2020, 05:55:24 PM

4 Replies
249 Views
Last post January 15, 2020, 05:55:24 PM
by Enthalpy
decomposition of propylene glycol to lactic acid (is it exothermic)

Started by postitme | Last post by Enthalpy January 13, 2020, 11:30:37 AM

7 Replies
339 Views
Last post January 13, 2020, 11:30:37 AM
by Enthalpy
4 Replies
205 Views
Last post January 13, 2020, 11:04:24 AM
by AWK
8 Replies
286 Views
Last post January 13, 2020, 10:33:35 AM
by AWK
How can I find the composition of a mixture between ice and water?

Started by Blueberries116 | Last post by Borek January 13, 2020, 08:35:25 AM

6 Replies
242 Views
Last post January 13, 2020, 08:35:25 AM
by Borek
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