What are the approximate percentages by mass of nitrogen and hydrogen respectively in urea?
47% and 7%
Urea has the molecular formula CO(NH2)2, i.e. CH4N2O, with molar mass = 12 + 4(1) + 2(14) + 16 = 60 g/mol. Mass % of nitrogen = (28/60) × 100 ≈ 46.7% ≈ 47%. Mass % of hydrogen = (4/60) × 100 ≈ 6.7% ≈ 7%. Hence the approximate percentages are 47% and 7%.
Similar Questions
The equivalent weight of oxalic acid in C2H2O4⋅2H2O is_________.
The compound C6H12 O4 contains________.
Which one of the following is a non-metallic mineral?
When pure water boils vigorously, the bubbles that rise to the surface are composed primarily of
The species that has the same number of electrons as \({}_{17}^{35}Cl\) is
How much CO 2is produced on heating of 1 kg of carbon?
Which one of the following methods can be used to separate anthracene from a mixture of salt and anthracene ?
Which one of the following is called dry ice?
Which one of the following statements about the law of conservation of mass is correct?
- Which one of the following salts is responsible for temporary hardness of water?
Important Questions from Basic Concepts of Chemistry
Which of the following pair is correct?
I. Isotopes – different mass numbers
II. Isobars – different atomic numbers
Which of the following is a zone of a flame?
I. Dark
II. Luminous
III. Non-Luminous
Sphalerite is an ore of:
If formula of sodium salt of an anion X is \(Na_2X\) , then the formula of its aluminium salt would be
Which of the following set contains same number of molecules?
A. 1 gram O 2, 2 grams SO 2
B. 1 gram CO 2, 1 gram N 2O
C. 1 gram O 2, 1 gram O 3
