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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 KristinW March 12, 2019, 09:57:01 AM

4 Replies
33644 Views
Last post March 12, 2019, 09:57:01 AM
by KristinW
NaBH4 reduction

Started by Jstub | Last post by Jstub Today at 09:52:44 PM

0 Replies
14 Views
Last post Today at 09:52:44 PM
by Jstub
Show the acid nature of hydrogen sulfide

Started by kaloyan_kolev | Last post by AWK November 10, 2019, 07:59:10 AM

1 Replies
68 Views
Last post November 10, 2019, 07:59:10 AM
by AWK
Please help, I'm desperate ;-;

Started by Srcinccino | Last post by mjc123 Today at 04:39:26 AM

1 Replies
81 Views
Last post Today at 04:39:26 AM
by mjc123
Bomb Calorimetry, gas fuel.

Started by AdoPross | Last post by AdoPross September 29, 2019, 06:15:19 PM

0 Replies
88 Views
Last post September 29, 2019, 06:15:19 PM
by AdoPross
trend of atomic size in inner transitional elements?

Started by mana | Last post by mana October 14, 2019, 04:16:12 AM

0 Replies
88 Views
Last post October 14, 2019, 04:16:12 AM
by mana
electron cloud of the anion and covalent character of a bond

Started by mana | Last post by mana October 17, 2019, 01:28:36 PM

0 Replies
88 Views
Last post October 17, 2019, 01:28:36 PM
by mana
Nernst equation and Fe3+/Fe2+ ratio help

Started by mburn | Last post by Borek October 25, 2019, 02:44:51 AM

1 Replies
113 Views
Last post October 25, 2019, 02:44:51 AM
by Borek
Which provides the most F^- in 1.0 L of water?

Started by Roddy3 | Last post by Borek October 28, 2019, 07:32:35 PM

1 Replies
114 Views
Last post October 28, 2019, 07:32:35 PM
by Borek
Weight percent problem im struggling with

Started by needhelpw1prob | Last post by chenbeier October 30, 2019, 05:00:28 PM

1 Replies
114 Views
Last post October 30, 2019, 05:00:28 PM
by chenbeier
Extractions

Started by Jstub | Last post by Jstub October 10, 2019, 04:08:08 PM

2 Replies
120 Views
Last post October 10, 2019, 04:08:08 PM
by Jstub
Greenhouse gases

Started by AceOfSpade | Last post by AceOfSpade September 24, 2019, 02:05:44 PM

0 Replies
123 Views
Last post September 24, 2019, 02:05:44 PM
by AceOfSpade
Enthalpy Change Question

Started by SushiSalad | Last post by sjb October 25, 2019, 06:21:11 AM

1 Replies
123 Views
Last post October 25, 2019, 06:21:11 AM
by sjb
Element clarification

Started by rjsmith99 | Last post by AWK November 08, 2019, 01:46:20 AM

1 Replies
123 Views
Last post November 08, 2019, 01:46:20 AM
by AWK
1 Replies
124 Views
Last post September 30, 2019, 06:06:34 PM
by Enthalpy
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