Protein content in foods animal feeds milk etc. is commonly determined by combus

Protein content in foods animal feeds milk etc. is commonly determined by
combustion analysis for nitrogen content in CnHmOpNq. The average N-content of pure
proteins is about 16% by weight. In comparison carbohydrates typically contain no (or
little) nitrogen with C:H:O ratios close to 1:2:1. In recent years many products including
dairy products and pet food manufactured in China were found to be tainted with a
synthetic chemical known as Melamine C3H6N6. Industrial applications of Melamine
include polymers and adhesives. The best known scandal related to Melamine
contamination in China is that Melamine was found in milk powder for infants which led
to the deaths of six babies and made some 300000 ill. Six people were linked to the
scandal and two of the convicts were sentenced to death and executed in 2009.
(a) Calculate the N-content by weight in Melamine.(b) If a diary product is analyzed to have an N-content of 10% what are the proportions
of protein and carbohydrate in this product?(c) If 100 kg of the same product as in (b) is tainted with 5 kg Melamine what is the
apparent N-content of this product?