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Question :- What is the percent composition of silicon in silicon carbide (SiC)?
A. 28%
B. 50%
C. 70%
D. 142%
Answer :- The percentage of silicon content in silicon carbide (SiC) is option (C) 70%.
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Answer : The correct option is, (C) 70%
Explanation : Given,
Molar mass of Si = 28.09 g/mole
Molar mass of C = 12 g/mole
Molecular mass of SiC = 28.09 + 12 = 40.09 g/mole
To calculate the mass percent of an element in a compound, we use the equation:
[tex]\text{Percent composition of Si}=\frac{\text{Mass of Si in compound}}{\text{Mass of the compound}}\times 100[/tex]
Now put all the given values in above equation, we get:
[tex]\text{Percent composition of Si}=\frac{28.09g}{40.09g}\times 100=70\%[/tex]
Hence, the percentage composition of Si in the given compound is 70%
