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The silica content of magma greatly affects its viscosity. Magma with a high silica content has a? 15.00g of Si reacts with 25.00g of F2 to produce 28.67g of SiF4. Which reactant is the limiting reagent? Find the complement of the angle 3pi/7. Please show steps!? If x^2+y^2 = 6, and x+y=3, then what is x^3+y^3? How many edges in a circle?