Skip to main content

Questions tagged [composition]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
0 answers
36 views

How do I tell what the chemical composition of a rock is? [closed]

I love to look at rocks, they are so fascinating, but I always find myself wondering how many of each kind of atom are in this particular rock, or how many atoms in total. The only thing I can tell is ...
Boo Lightning's user avatar
3 votes
0 answers
44 views

Calculate percent composition from XPS?

I have an XPS graph and was wondering how to calculate percent composition. I do have the percent compositions that were determined from the graph, but I don't know how they were found. For reference, ...
lzzard's user avatar
  • 39
0 votes
0 answers
29 views

What is the most accurate way to determine the amount of water in a material from XRF and LOD-105 results?

this might seem like a silly question but I want to be sure. I have the results from an external laboratory for the bulk chemical composition (by XRF) and moisture (by Loss on Drying to 105 degrees ...
Hendrix13's user avatar
  • 490
1 vote
1 answer
82 views

What household objects are made of metals with a high degree of purity?

I've looked into this briefly and from what I've understood, the kind of copper that's used to make electric copper wire is generally of a high purity (well above 99%). What are some other household ...
SpotXSpot's user avatar
  • 113
1 vote
0 answers
74 views

How to get the total number of numbered positions in a molecule/compound

I'm working on a metabolite database where "labeled" compounds can contain isotopically labeled atoms in specific positions. When a new labeled compound is entered into the database, we'd ...
hepcat72's user avatar
  • 119
2 votes
1 answer
367 views

Can chemical composition be determined from elemental composition?

I have the energy dispersive X-ray spectroscopy results from a sample of salt that I produced by collecting and processing ocean water by filtering, boiling, evaporating, and additional steps to try ...
Kevin Su's user avatar
2 votes
2 answers
1k views

What is the composition of diet coke?

I've been trying to find the values of any sort of percentage composition of diet coke and I haven't found any luck other than one interviewee (Dr. MAUREEN STOREY [Senior Vice President, Science ...
Chosenerd's user avatar
-3 votes
1 answer
476 views

How do I calculate weight percent of BaCl2

A $\pu{0.1036 g}$ sample containing only $\ce{BaCl2}$ and $\ce{NaCl}$ is dissolved in $\pu{50 mL}$ of distilled water. Titrating with $\pu{0.07916 M}$ $\ce{AgNO3}$ requires $\pu{19.46 mL}$ to reach ...
Opeoluwa Yusuf's user avatar
-1 votes
1 answer
1k views

Are those magnetic iron filings in the dirt pure iron?

When I was a kid we used to drag magnets around in the dirt and collect "iron filings". Are they pure iron, or something else?
Scooby's user avatar
  • 9
6 votes
1 answer
6k views

Why are all 3 of propane, butane and isobutane used in deodorant sprays?

Here are the back ingredient labels of a few popular commercial alcohol-based deodorant sprays. As one can clearly see, they all have many things in common, but the 3 which are of importance in lieu ...
Sir Arthur7's user avatar
  • 1,169