Question:
What is the mass percentage of carbon in urea? (Molar mass of urea = \(60\,\text{g mol}^{-1}\))
What is the mass percentage of carbon in urea? (Molar mass of urea = \(60\,\text{g mol}^{-1}\))
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Mass percentage is calculated using the formula:
\(\frac{\text{Mass of element}}{\text{Molar mass of compound}} \times 100\).
Updated On: Mar 28, 2026
- \(28.0%\)
- \(20.0%\)
- \(26.67%\)
- \(46.67%\)
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The Correct Option is B
Solution and Explanation
Step 1: Write molecular formula of urea.
Urea = \(\text{CO(NH}_2)_2\).
Step 2: Calculate mass of carbon.
Mass of carbon in one mole of urea = \(12\,\text{g}\).
Step 3: Calculate mass percentage.
\[ %\text{ of C} = \frac{12}{60} \times 100 = 20.0% \] Step 4: Conclusion.
Thus, the mass percentage of carbon in urea is \(20.0%\).
Urea = \(\text{CO(NH}_2)_2\).
Step 2: Calculate mass of carbon.
Mass of carbon in one mole of urea = \(12\,\text{g}\).
Step 3: Calculate mass percentage.
\[ %\text{ of C} = \frac{12}{60} \times 100 = 20.0% \] Step 4: Conclusion.
Thus, the mass percentage of carbon in urea is \(20.0%\).
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