select the correct answer. what is the percent composition of silicon in silicon carbide (sic)? a. 28% b…

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

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

Answer

Explanation:

Step1: Find atomic masses

The atomic mass of silicon (Si) is approximately 28 g/mol and the atomic mass of carbon (C) is approximately 12 g/mol.

Step2: Calculate molar - mass of SiC

The molar - mass of SiC, $M_{SiC}=28 + 12=40$ g/mol.

Step3: Calculate percent composition of Si

The percent composition of Si in SiC is $\frac{28}{40}\times100% = 70%$.

Answer:

C. 70%