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12 questions from the last 7 days
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6 votes
3 answers
497 views

I have made a effort to recalculate the wavefunction of the electrons of the He atom. Schrödinger’s time-independent equation in natural units for the He atom is $$\left(-\frac 12\vec\nabla^2_{r_1} - \...
Root Groves's user avatar
  • 201
3 votes
1 answer
380 views

I am removing high phosphorous (5~10%) nickel electroless plating from alumina circuit boards using 125 ml concentrated nitric acid to 250 ml water and 60 ml 35% hydrogen peroxide, generally following ...
uhoh's user avatar
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6 votes
2 answers
96 views

I was recently studying chemical bonding for the first time where I was introduced to molecular geometry and molecular shape. What is the exact difference between these to terms used in VSEPR? For ...
Rudra's user avatar
  • 71
0 votes
1 answer
85 views

I recently took a test for a lab class I have and one of the questions was: In the Classical Solar System model, what was the atom like? a: there is a nucleus where the proton resides b: There are ...
Sturgeons4life's user avatar
  • 21
1 vote
0 answers
62 views

I am working on an assignment for university where I have to design a process to produce a certain product. The stream that initially enters my reactor actually is a mixture of three streams: a fresh ...
Anna's user avatar
  • 632
1 vote
0 answers
70 views

I am working on a project for a university assignment, and part of this requires me to model a flash tank in Python. I am wondering if it is a reasonable assumption that we can fix both the ...
Anna's user avatar
  • 632
1 vote
0 answers
61 views

Soft drinks are typically sold in translucent plastic bottles - whether smaller 0.5L, larger 1.5L or 2.0L, or other sizes. In this question, let's focus on bottles made from PET (poly(ethylene ...
einpoklum's user avatar
  • 119
-4 votes
0 answers
36 views

I have an interesting question for you all! I'm interested in your personal opinion of using Ethyl Lactate as a fire breathing fluid. Most fire breathers will use ultra pure lamp oil, which is not ...
John Mo's user avatar
  • 1
0 votes
0 answers
47 views

There is a problem sequence in this year's IChO preparatory, based on the synthesis of ribonucleic acids in the prebiotic earth suggested by Powner et al.: (Adapted from Nature) Apparently the ...
Cuckoo Beats's user avatar
  • 1,123
-2 votes
0 answers
37 views

This may be for my Australians out there. There is a popular drink in Australia known as Solo. It is a lemonade drink that is lightly carbonated. I am trying to recreate it with my limited chemistry ...
user221725's user avatar
  • 1
-2 votes
1 answer
41 views

I found data on the boiling point of the isomers of heptane and hexane. For example I am interested how to determinate branching of 2-methilhexane and 3-methilhexane, which of them would and why would ...
Redoks's user avatar
  • 9
-5 votes
0 answers
17 views

Background DMSO is a skin penetration enhancer. Sodium azide (NaN₃) is toxic. When mixed, DMSO can carry azide through skin without chemical change. I want to understand the hazards. Questions ...
Jeet Kaur's user avatar
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