Here are 5 different types of everyday gases people use.
1. Helium helps us blow up balloons for special occasions.
2. Carbon dioxide gives us carbonated drinks.
3. Oxygen helps us weld materials.
4. Propane helps us start fires, or heats things.
5. Butane is in our everyday fire lighters/starters and even torches.
Hope I could help! :)
Answer : The formula of the missing product is, 
Explanation :
The given incomplete equation representing a reaction,

When the sodium metal react with the water then it gives a colorless solution of sodium hydroxide and hydrogen gas. In the solution, sodium hydroxide is present in the form of ions i.e,
and
ions.
The balanced chemical reaction will be,

Therefore, the formula of the missing product is, 
Answer:
5SiO2 + 2CaC2 --> 5Si + 2CaO + 4CO2
4NH3 + 5O2 --> 4NO + 6H2O
Benzene and oil are related to organic chemistry branch.
Organic chemistry mostly deals with hydrocarbons (benzene is made from hydrocarbons)
Therefore, the chemist that uses benzene to make a new type of plastic is an organic chemist.