. It is an organic compound composed of carbon, nitrogen, oxygen and hydrogen, also known as urea (the homonym of urine). Its chemical formula is
calcium hydrogen phosphate
or
cn2h4o，
Methods: The industrial synthesis of 1 melamine was mainly based on urea. Under the conditions of heating and certain pressure: 6.
(nh2)2co
→
c3h6n6
+
six
nh3
+
three
carbon dioxide
Methods Urea hydrolyzed CO (NH2) 2+H2O = CO2+2nh3.
Method 3: heating to 160℃ for decomposition, and the generated ammonia gas is simultaneously converted into cyanic acid.
(nh2)2co
——nh3+hocn
(unbalanced
Conditional unmarked
Urea can be hydrolyzed to produce ammonia and carbon dioxide under the action of acid, alkali and enzyme (acid and alkali need to be heated).
(nh2)co——co2+nh3
(unbalanced
Conditional unmarked