Question on: JAMB Chemistry - 2014
What is the percentage of sulphur in sulphur (IV) oxide?
A
66%
B
25%
C
40%
D
50%
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Correct Option: D
To calculate the percentage of sulfur in sulfur(IV) oxide (SO 2 ), we need to determine the molar mass of both sulfur and sulfur dioxide, then use the following formula:
Percentage of Sulfur = ( (Molar mass of Sulfur) / (Molar mass of Sulfur Dioxide) ) * 100%
- Molar mass of Sulfur (S): 32 g/mol
- Molar mass of Sulfur Dioxide (SO
2
):
- Sulfur (S): 32 g/mol
- Oxygen (O): 16 g/mol x 2 = 32 g/mol
- Total: 32 + 32 = 64 g/mol
- Calculation:
- Percentage of Sulfur = (32 g/mol / 64 g/mol) * 100% = 50%
Therefore, the percentage of sulfur in sulfur(IV) oxide is 50%.
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