What is the percent composition of silicon in silicon carbide (sic)? a. 28% b. 50% c. 70% d. 142%

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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:

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

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

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

bcde is the incorrect answer it is a