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What is the normality of an acid if 21.18 mL were needed to titrate 0.1369 g Na2CO3? Is a flying roach the same as a Palmetto bug? What is the cartesian form for sqrt(e ^ipi/3? How do I use de Moivre's formula to evaluate (cos pi/7 + i sin pi/7) ^7 in cartesian form? Why do you need to use L'Hopital's Rule to find the limit below? limâ”¬(