5.792
Reduce 75329 mm
53. Express 8205 g
54. Express 72.895 tres
55. Express 9 cuble cenili
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Answer:
In early production, first calcium cyanamide was converted into dicyandiamide, which was heated above its melting temperature to produce melamine. Today most industrial manufacturers use urea in the following reaction to produce melamine: 6 (NH2)2CO → C3H6N6 + 6 NH3 + 3 CO.
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