What information does the chemical shift of an nmr signal convey? select the correct answer?

Answer is: position and number of chemical shifts give information about the structure of a organic molecule. Chemical shift is the position on the δ scale (ppm - parts per million) where the peak occurs. Chemical shift describe the relative positions of the resonances in an NMR spectrum.

Temperature and pressure

The mass has escaped into a gas which you can not see so the law stays true.