Help me please..

Question

Silicon, which occurs in nature as SiO2, is the material from which most computer chips are made. If SiO2 is heated until it melts into a liquid, it reacts with solid carbon to form liquid silicon and carbon monoxide gas. In an industrial preparation of silicon, 59.8 kg of SiO2 reacted with 25.8 kg  of carbon to produce 22.4 kg of silicon.

Part A

Determine the limiting reactant.

Part B

Determine the theoretical yield.

Part C

Determine the percent yield for the reaction.

Answer 1

SiO₂ + 2C → Si + 2CO balanced equation

SiO₂ = 60 g/mol

Si = 28g/mol

C = 12 g/mol

CO = 28 g/mol

PART A

60g of SiO₂ reacts with 24g of C, so 59.8kg of SiO₂ should react with:

60/24 = 59.8/x

x = 23.92 kg of C

Since you have 25.8 kg of C, the limit reagent is SiO₂

PART B

60g of SiO₂ produces 28 g of Si, so 59.8kg of SiO₂ should produce:

60/28 = 59.8/y

y = 27.91 kg of Si

PART C

Since 27.91 kg is the theoretical yield, 22.4 kg is:

22.4/29.91 = 0.803

So, the percent of the reaction is:

80.3%