1. NH3 is the compound for ammonia and it is a neutral compound which has no charge. Ammonia is a basic (alkaline) solution. The one nitrogen (N) atom shares one electron with each of hydrogen (H) atom. The nitrogen forms 3 covalent bonds with the three hydrogen (H3). So each hydrogen atom has 1 bond.
Ammonia is formed through a covalent bond. It only has single covalent bonds between the 3 hydrogen atoms (H3). Nitrogen needs 3 electrons and each hydrogen needs 1. Ammonia does have a ‘lone pair’ of electrons tied to the nitrogen atom as there are just 3 bonded groups. NH3 electrons: 5+1+1+1 = 8. Having 8 valence electrons means it is stable.
Below is a picture of the diagram:
^ I wasn’t sure which way exactly so there’s a few drawings in it.
2. Hydrogen gas, methane gas, and nitrogen gas would have WHMIS symbols to denote hazards of the chemicals. All compressed gases have a symbol that looks like a cylindrical container with a circle or red diamond outline around it. Compressed hydrogen is a flammable gas. It may explode if heated. The symbol is a flame with a circle or red diamond around it. Nitrogen gas is an asphyxiant and not flammable. It would just have the compressed gas symbol. Methane gas is highly flammable and combustible. The symbol would show a flame surrounded by either a circle or a red diamond shape.
The Haber process has an exothermic reaction so the temperature must be lowered and works best under the right amount of increased pressure to produce ammonia gas.
The gases should not be exposed to extreme pressures or heat. Safety precautions include equipment such as having a fire extinguisher nearby, reading labels and following any safety data sheets, and wear appropriate clothing. Handling chemicals often requires eye/face protection, gloves, boots, and breathing apparatus’. Keep the containers away from sparks, hot surfaces, open flames, and other possible ignition sources. The nitrogen should be kept in a well-ventilated area because it can cause rapid suffocation.