16. Calculate 56.219.2057 using significant number rules. 517.45 B. 517.5 C. 517 D. 517.452 117. There are and B. 6,2 C. 2,2 D. 2,6 4. 2 Q18. What is bybridization of the nitrogen atom in the ion NO31 A. 5pp B. sp2 C. sp3 D. sp3d Q19. In which case is the bond polarity incorrect? C. 5+CBr6 D. +SiO A. BF B. +FO Q29. Which correctly describes experimental data if the exact value 5.50 ? The experimental data 5.49,5.50,5.51,5.49, and 5.52 A. Precise, but not accurate B. Accurate, but not precise C. Both accurate and precise D. Neither accurate nor precise