Calculate Percentage of Nitrogen in Urea (H2NCONH2) | N Proportion Homework

  • Thread starter Thread starter chawki
  • Start date Start date
Click For Summary
SUMMARY

The percentage of nitrogen in urea (H2NCONH2) is calculated to be 46.66%. This is derived using the formula %N = [(molar mass of nitrogen)(number of nitrogen atoms in the molecule)] / (molar mass of the molecule). The molar mass of nitrogen is 28 g/mol, and the total molar mass of urea is 60 g/mol. Both the direct calculation and the rearranged equation yield the same result, confirming the accuracy of the method.

PREREQUISITES
  • Understanding of molar mass calculations
  • Basic knowledge of chemical formulas
  • Familiarity with percentage calculations in chemistry
  • Ability to manipulate algebraic equations
NEXT STEPS
  • Study the concept of molar mass in detail
  • Learn about stoichiometry and its applications in chemical reactions
  • Explore advanced percentage calculations in chemistry
  • Investigate the properties and uses of urea in various chemical contexts
USEFUL FOR

Students studying chemistry, particularly those focusing on stoichiometry and molecular composition, as well as educators looking for clear examples of percentage calculations in chemical compounds.

chawki
Messages
504
Reaction score
0

Homework Statement



Calculate the percentage of nitrogen in urea (H2NCONH2).


Homework Equations





The Attempt at a Solution


I tried and found %N = 46.66%
 
Physics news on Phys.org
That's the answer I get too. % N = [(molar mass N)(# N atoms in molecule)]/(molar mass of molecule)
 
i got it by this law: 28/N% = 60/100%
therefore: N% = (28 X 100) / (60)
 
Equally valid. If you rearrange your equation (or mine), you'll see that they are equivalent.

I like to show units, though, because it offers a good "check" if I need it and can keeps me from getting confused.
 

Similar threads

Can hydrogen be abstracted from urea?
  • · Replies 3 ·
Replies
3
Views
2K
Chemistry Calculating Compound Proportions: Nitrogen and Oxygen Mass Percentages
  • · Replies 1 ·
Replies
1
Views
2K
Chemistry Calculating Mass Percentage of N2H4 in Hydrogen/Nitrogen Mixtures
  • · Replies 1 ·
Replies
1
Views
2K
Finding order of reaction & rate constant
  • · Replies 3 ·
Replies
3
Views
5K
Solve Katharometer Question: Limit Errors to +0.1% Oxygen
  • · Replies 1 ·
Replies
1
Views
2K
A problem in Redox Titrations (Kjeldhal's Method)
  • · Replies 6 ·
Replies
6
Views
2K
Chemistry Finding the Chemical Formula and Relative Molecular Mass
  • · Replies 13 ·
Replies
13
Views
4K
Maximum Covalent Bonds Formed by Carbon with Nitrogen?
  • · Replies 6 ·
Replies
6
Views
3K
Calculating temperature change when dissolving Urea
  • · Replies 2 ·
Replies
2
Views
7K
Does changes in pH affect tertiery protein?
  • · Replies 1 ·
Replies
1
Views
2K