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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
35152 Views
Last post December 31, 2018, 02:39:30 PM
by wildfyr
Percent by Volume of/in Air

Started by bfl27 | Last post by Vapelow Today at 01:44:11 PM

2 Replies
61 Views
Last post Today at 01:44:11 PM
by Vapelow
Relative atomic mass problems

Started by 38175425 | Last post by Enthalpy Yesterday at 11:20:33 AM

2 Replies
78 Views
Last post Yesterday at 11:20:33 AM
by Enthalpy
Heavy metals and oil

Started by VG808 | Last post by VG808 January 08, 2020, 08:27:03 PM

0 Replies
92 Views
Last post January 08, 2020, 08:27:03 PM
by VG808
MOVED: Nitrogen Flushing For Food

Started by Borek | Last post by Borek January 08, 2020, 03:06:57 AM

0 Replies
100 Views
Last post January 08, 2020, 03:06:57 AM
by Borek
How do I eliminate the ions in this redox reaction

Started by yodalr | Last post by chenbeier January 10, 2020, 11:43:59 AM

1 Replies
141 Views
Last post January 10, 2020, 11:43:59 AM
by chenbeier
Bomb Calorimetry, gas fuel.

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

0 Replies
142 Views
Last post September 29, 2019, 06:15:19 PM
by AdoPross
Zn and Ag Redox Reaction

Started by joc95 | Last post by AWK January 07, 2020, 01:39:07 AM

1 Replies
147 Views
Last post January 07, 2020, 01:39:07 AM
by AWK
referent calomel electrode

Started by babygirl | Last post by babygirl December 10, 2019, 08:25:41 AM

0 Replies
149 Views
Last post December 10, 2019, 08:25:41 AM
by babygirl
4 Replies
152 Views
Last post January 13, 2020, 11:04:24 AM
by AWK
trend of atomic size in inner transitional elements?

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

0 Replies
153 Views
Last post October 14, 2019, 04:16:12 AM
by mana
Greenhouse gases

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

0 Replies
157 Views
Last post September 24, 2019, 02:05:44 PM
by AceOfSpade
How to obtain the mass of carbon from a two step reaction?

Started by Blueberries116 | Last post by Borek January 02, 2020, 04:28:52 AM

1 Replies
159 Views
Last post January 02, 2020, 04:28:52 AM
by Borek
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
162 Views
Last post October 17, 2019, 01:28:36 PM
by mana
HOW DO YOU KNOW IF A DELOCALIZED PI BOND OCCURS?

Started by vxchen | Last post by vxchen November 19, 2019, 08:50:26 PM

0 Replies
164 Views
Last post November 19, 2019, 08:50:26 PM
by vxchen
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