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2. Stoichiometry - Wikipedia

   en.wikipedia.org/wiki/Stoichiometry

   Gas stoichiometry is the quantitative relationship (ratio) between reactants and products in a chemical reaction with reactions that produce gases. Gas stoichiometry applies when the gases produced are assumed to be ideal, and the temperature, pressure, and volume of the gases are all known. The ideal gas law is used for these calculations.

3. List of unsolved problems in chemistry - Wikipedia

   en.wikipedia.org/wiki/List_of_unsolved_problems...

   Protein folding problem: Is it possible to predict the secondary, tertiary and quaternary structure of a polypeptide sequence based solely on the sequence and environmental information? Inverse protein-folding problem: Is it possible to design a polypeptide sequence which will adopt a given structure under certain environmental conditions?

4. Law of definite proportions - Wikipedia

   en.wikipedia.org/wiki/Law_of_definite_proportions

   The law of definite proportion was given by Joseph Proust in 1797. [2]I shall conclude by deducing from these experiments the principle I have established at the commencement of this memoir, viz. that iron like many other metals is subject to the law of nature which presides at every true combination, that is to say, that it unites with two constant proportions of oxygen.

5. 10 Hard Math Problems That Even the Smartest People in the ...

   www.aol.com/10-hard-math-problems-even-150000090...

   Here’s another problem that’s very easy to write, but hard to solve. All you need to recall is the definition of rational numbers. Rational numbers can be written in the form p/q, where p and ...

6. Yield (chemistry) - Wikipedia

   en.wikipedia.org/wiki/Yield_(chemistry)

   Stoichiometry is used to run calculations about chemical reactions, for example, the stoichiometric mole ratio between reactants and products. The stoichiometry of a chemical reaction is based on chemical formulas and equations that provide the quantitative relation between the number of moles of various products and reactants, including yields ...

7. Mislabeled ‘Wicked’ doll packages with link to adult film ...

   www.aol.com/news/mislabeled-wicked-doll-packages...

   The mistake was pointed out by multiple social media users. X user Sarah Genao tweeted a picture of the Glinda doll Nov. 9 and included a photo of the incorrect link to the pornography site on the ...