The answer to 12 is that she would continue moving until something stopped her, i.e gravity
the answer to 13 is gravitational force. the gravitational force is stopping the chair from moving by pulling it down creating friction
We have to know the product formed on reaction of ethyl iodide with triethylamine.
The product is tetraethylammonium iodide salt.
On reaction of ethyl iodide with triethylamine, a quarternary salt is produced which is ionic in nature. The salt is ionic and polar, it gets dissolved in polar solvent but insoluble in non-polar solvent.
As it is ionic compound, its melting point is high, it does not melt below 200°C.
The structure of the product (tetraethylammonium iodide salt) is shown below:
Acids are hydrogen-containing compound that ionize to yield hydrogen ions (H⁺) in an aqueous solution
-bases are compound that ionize to yield hydroxide ions (OH⁻) in an aqueous solution
V1 / T1 = V2 / T2
3.5 / 20 = 3 / T2
T2 = 17.1 C