# chemistry

posted by Kelly

Reacting 959 mol of SiO2 with excess carbon yields 28.8 kg of SiC. What is the percentage yield?

SiO2 + 3C--> SiC + 2 CO

1. DrBob222

You must determine first the theoretical yield.
Using the coefficients in the balanced equation, convert moles SiO2 to moles SiC.

Convert moles SiC to grams. g = moles x molar mass. This is the theoretical yield.

%yield = [actual yield/theoretical yield]*100 = ??
actual yield is given in the problem as 28.8 kg but you must change this to grams OR change the theoretical yield to kg.

## Similar Questions

1. ### Chemistry

If 50.0 g of silicon dioxide is heated with an excess of carbon, 27.9g of silicon carbide is produced. SiO2(s) + 3C(s) --> SiC(s) + 2CO(g) what is the percent yield of this reaction?
2. ### CHEMISTRY

For the following reaction, what mass of SIC is made from120.2g of SIO2 and 120g of C?
3. ### CHEMISTRY

For the following reaction, what mass of SIC is made from120.2g of SIO2 and 120g of C?
4. ### Chemistry

Silicon Carbide, SiC,is prepared using the chemical reaction: SiO2 + 3C ---> SiC +2CO How many grams of SiC can be produced from 15.0g of C?
5. ### Chemistry

When 50.0g of silicon dioxide is heated with an excess of carbon 32.2 g of silicon carbide I'd produced. SiO2(s) + 3C(s) → SiC(s) + 2CO(g) A. What is the percent yield of this reaction?
6. ### chemistry

Silicon carbide is one of the hardest materials known. It is often known commercially as carborundum. Silicon carbide is used primarily as an abrasive for sandpaper and is manufactured by heating common sand (silicon dioxide, SiO2) …
7. ### Chemistry

Silicon carbide (SiC) is made by reacting sand (Silicon dioxide, SiO2) with powdered carbon at high temperature. Carbon monoxide is also formed. What is the percent yield if 51.4kg of SiC is recovered from processing 100.0kg of sand?
8. ### Chemistry

If 3.60 moles of SiO2 and 3.60 moles of C react to form SiC accodring to the equation SiO2 + 3 C -> SiC + 2 CO how many moles of CO will be produced?
9. ### chemistry

1. Silicon dioxide reacts with carbon upon heating to produce silicon carbide (SiC) and carbon monoxide. SiO2(s) + 3C(s) = SiC(s) + 2CO(g) a. What mass of carbon is required to react completely with 15.70 g of SiO2?
10. ### Chemistry

Given the following information determine the reaction Gibbs energy for the formation of silicon dioxide at 298 K Si(s)+O2(g) →SiO2(s) ΔfH°(Si(s))=0 kJ mol-1, S°(Si(s))=18.8 J mol-1 K-1 ΔfH°(O2(g))=0 kJ mol-1, S°(O2(g))=205.0 …

More Similar Questions