Find the limiting reactant for each initial amount of reactants in the following reaction: 2Na(s) + Br2(g) + 2NaBr(s)

Part A: 3 mol Na and 3 mol Br2
Part B: 1.6 mol Na and 1.2 mol Br2
Part C: 2.5 mol Na and 1 mol Br2
Part D: 12.9 mol Na and 6.9 mol Br2

Express your answers as a chemical formula.
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Answer is to avoid experimental error

The reaction 2kalsi3o8 + 2(h+ + hco3-) + h2o  →  al2si2o5(oh)4 + 2k+ + 2hco3- + 4sio2 shows that feldspar kalsi3o8 is chemically altered by hydrolysis to form chalky-looking clay mineral kaolinite al2si2o5(oh)4. the chemical breakdown of potassium feldspar due to exposure to acidic water results to the mineral binding with the water molecule to become kaolinite with silica and potassium and bicarbonate ions in solution.

I'm pretty sure its c