Question

What is the percent composition of silicon in silicon carbide (SiC)? A. 28% B. 50% C. 70% D. 142%

Answer 1

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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 2

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:

`\text{Percent composition of Si}=\frac{\text{Mass of Si in compound}}{\text{Mass of the compound}}* 100`

Now put all the given values in above equation, we get:

`\text{Percent composition of Si}=(28.09g)/(40.09g)* 100=70\%`

Hence, the percentage composition of Si in the given compound is 70%