Give the correct balanced equation for the single replacement reaction of magnesium with aluminum oxide.
a) mg + alo → mgo + al
b) mg + al2o3 → mgo + al
c) 3mg + al2o3 → 3mgo + 2al
d) mg + al2o3 → mgo3 + al2

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.