Chemistry help please.?

Determine the limiting reactant when a mixture of 5.00 × 103 g SiO2 and 5.00 x 103 g carbon react. What is the theoretical yield of silicon carbide? SiO2(s) + C(s) → SiC(s) + CO(g) Do i have to balance out this equation first? Do i still group SIO2 together when taking the mass on riht side after i... show more Determine the limiting reactant when a mixture of 5.00 × 103 g SiO2 and 5.00 x 103 g carbon react. What is the theoretical yield of silicon carbide?

SiO2(s) + C(s) → SiC(s) + CO(g)

Do i have to balance out this equation first? Do i still group SIO2 together when taking the mass on riht side after i balance? Thanks for the help
Update: when i balanced it i got SIO2(S) + 3C(S) = SIC(S) + 2CO(G)
Update 2: I figured SIO2 is the limiting reactant
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