Urea is one of the most important organic compounds in chemistry. It is widely used as an agricultural fertilizer and is a major component of human urine. Calculating its molecular weight is a standard exercise in basic stoichiometry.
Urea holds a highly special place in history. In 1828, chemist Friedrich Wöhler artificially synthesized urea in a lab. This proved that 'organic' chemicals found in living beings could be created from 'inorganic' minerals, changing the course of Chemistry forever!
To calculate the molecular weight, you must first know the chemical formula of Urea. Formula: CO(NH₂)₂ or NH₂CONH₂
This tells us that one molecule of Urea contains:
To find the total molecular weight (molar mass), we multiply the number of atoms by their respective standard atomic masses:
Now, add them up:
Total = 12.01 + 16.00 + 28.02 + 4.04 = 60.07
The molecular weight (molar mass) of Urea is approximately 60.06 g/mol (Often rounded simply to 60 g/mol in school exams for easier calculations).
Urea is used as a fertilizer because it has an incredibly high Nitrogen content (about 46% by weight). Nitrogen is essential for leafy green plant growth.
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