Chapter 11.6, Problem 2.1ACP

### Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

Chapter
Section

### Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

# Calculate the weight percent of nitrogen in melamine and cyanuric acid and compare this value to the average percent of nitrogen in protein (14%).

Interpretation Introduction

Interpretation:

It should be calculate and compare the weight percentage of nitrogen in melamine and cyanuric acid with the average percent of nitrogen in protein.

Concept Introduction:

Percentage of Weight: The grams of solute in 100 grams of solution, the fallowing formula is,

Percentageweight=Weightofsolute(g)Weightofsolution(g)×100

A hydrogen bonding is partially an electrostatic attraction between H atom which is bonded to more electronegative atom such as N, O, orF and another adjacent atom bearing a lone pair of electron.

Explanation

The chemical formula for melamine is C3H6N6 so the molecular weight of melamine is

C3H6N6â€‰Massâ€‰ofâ€‰carbonâ€‰atomsâ€‰=â€‰3Ã—12=â€‰36Massâ€‰ofâ€‰hydrogenâ€‰atoms=â€‰1.01â€‰Ã—â€‰6=â€‰6.01Massâ€‰ofâ€‰nitrogenâ€‰atom=â€‰14.01Ã—6â€‰=â€‰84âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’Totalâ€‰massâ€‰valueâ€‰ofâ€‰givenâ€‰compoundâ€‰=â€‰126.13âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’âˆ’

Next we calculate the mass melamine N%

In melamine=Molecularâ€‰weightâ€‰ofâ€‰nitrogenâ€‰=â€‰84â€‰â€‰=â€‰84126Ã—100â€‰=â€‰66

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