Express as a percentage, giving your answer correct to 3 significant figures where necessary.
a)2/7 B)0.279 c)1 2/9
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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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