2.2 A student heated zinc powder in air. The equation for the reaction that happened is shown below 2Zn, +0. 2Zno
The student weighed the mass of the powder before and after the reaction
Describe the change that would hhappen to the mass of the powder during the reaction,
Explain this change using ideas from the particle model.

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

Assume that 13.5 g solid aluminum (al) react with hcl to produce solid aluminum chloride (alcl3) salt and gaseous hydrogen (h2) at standard temperature and pressure.

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.