<span> These related to the polarities of the column and of the eluting solvent </span><span>When you run a column are
1) always start with a more non-polar solvent ratio and SLOWLY increase the polarity of the solvent.
1) Columns are generally made with silica which is highly polar, so compounds that are more polar in nature will interact with the silica more than those that are non-polar.
3) The first fractions to come out should be most non-polar, with each fraction collected after that being more and more polar.
hope this helps</span>
Answer:
Solid potassium iodide decomposes into solid potassium and iodide gas.
Explanation:
The answer given has a subscript "2" on the iodine at the start of the equation. Why is the 2 there as a subscript?
Elements in the same group in the periodic table have similar chemical properties. Hydrogen and Lithium, who both belong to alkali metal group, have the same chemical properties.
If you look at your Chemistry reference table, the answer should be about 62g of NH4Cl. Lining up the lines of solubility and temperature, you should come to that answer.