Question

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?

b. When 152 g of SiO2 reacts with excess carbon, what mass of SiC is produced?

c. If 42.2 g of CO were produced by this reaction, what mass of carbon must have reacted?

Answer 1

how many moles of SiO2?
Each mole needs 3 moles of C.

similarly for the other parts. work with moles, then back to grams.

Answer 2

a) 14.6 g
B) 23.76 g
C) 38.54 g