This chemist was most likely investigating the solubility of the substance<span>. Solubility is the chemical property that refers the maximum amount of solute that can be dissolved in a certain amount of solvent at a given temperature and pressure. Here the 33 g of the unknown substance is the solute and the 100 ml of water is the solvent. The solubility is expressed as 33 g / 100 g of water.</span><span />
Explanation:
Uranium have an unstable nuclei , hence it is a radioactive element , and radioactive element can undergo radioactive decay like the alpha decay , beta decay .
Radioactive decay is a spontaneous breakdown of the atomic nucleus which , results in the release of energy along with radioactive particles , like alpha , beta , gamma etc .
Hence ,
The mass is lost from a sample of uranium .
A species that is isoelectronic with the oxide ion will have the same electron configuration of electrons as as the oxide ion.
4 species that are isoelectronic with the oxide ion are F^(-), Ne, Na^(+), and Mg^(2+).
All of the electron configuration of these ions end at 2p⁶.
1st balance C : C5H12 -> 5CO2
2nd balance H: C5H12 -> 6H2O
final balance O : (5x2+6)/2=8 -> 8O2
So answer is: C5H12+ 8O2 -> 5CO2+ 6H2O