Explanation:
Kevlar is a fiber which is used in making of bullet proof vests and armors. It is a co-polymer which is formed by condensing two organic molecules 1,4-phenylene-diamine and terephthaloyl chloride.
![NH_2C_6H_4NH_2+Cl-(CO)-C_6H_4-(CO)-Cl\xrightarrow[-2HCl]{ }](https://tex.z-dn.net/?f=NH_2C_6H_4NH_2%2BCl-%28CO%29-C_6H_4-%28CO%29-Cl%5Cxrightarrow%5B-2HCl%5D%7B%20%7D%20)
![NH_2-C_6H_4-NH-CO-C_6H_4-COOH](https://tex.z-dn.net/?f=NH_2-C_6H_4-NH-CO-C_6H_4-COOH)
For Structure refer to image attached.
Sn=2
C and O=6
Im pretty confident yet I forgot a bit.
Au is the symbol for gold. It comes from Latin word for gold, which is Aurunum. Its atomic number is 79.
Answer:
Explanation:
The equation is given as:
CH3CHOHC2H4CHO + CH3OH --> CYCLIC ACETAL + H2O
This above equation is carried out in the presence of a strong acid. There are five mechanisms employed and they are:
Step 1:
Initial formation of the hemiacetal which takes several steps
Step 2:
Addition of a proton. The hemicetal is protonated on the hydroxyl group (-OH group)
Step 3:
As seen a bond is broken to give the H2O molecule and a resonance stabilized cation.
The carbonyl group on the cation is enriched with the oxygen-18 got from the H2O molecule as seen in the mechanism.
Step 4:
An attraction occurs between electrophile and nucleophile i.e the stabilised cation and the lone paids of the methanol.
Step 5:
Finally, a proton (+) is removed from the molecule by a lone pair of electron on the methanol.
Attached are the Steps 1 - 5 mechanism below
Ammonia is colorless gas with a characteristic smell. Its density is 0.589 times than air which makes it lighter than air. Ammonia can be easily liquefied due to the hydrogen bonding between the molecules. The boiling point is at -33.3 degrees Celsius and the freezing point is at -77.7 degrees Celsius.