22. A student carefully measures a certain quantity of four different substances into trays that will be used in a laboratory exercise. Which of these trays would
contain the largest number of atoms?
Sample
Mass of tray
with sample
Water
Mass of
empty tray
37.86g
36.59g
37.418
55.88g
Table Salt (NaCl)
Copper Wire
95.03g
100.96g
245.20g
Lead Shot
38.08g

Benzonitrile (c6h5cn) is reduced to two different products depending on the reducing agent used. treatment with lithium aluminum hydride followed by water forms k, which has a molecular ion in its mass spectrum at 107 and the following ir absorptions: 3373, 3290, 3062, 2920, and 1600 cm-1. treatment with a milder reducing agent forms l, which has a molecular ion in its mass spectrum at 106 and the following ir absorptions: 3086, 2850, 2820, 2736, 1703, and 1600 cm-1. l shows fragments in its mass spectrum at m/z = 105 and 77. propose structures for k and l and choose an explanation for how this could be concluded.