5. Which of the following is a nonoxy acid: a. H2SO4 b. HCl c2H3PO4 d. HOBr 6- Calculate the mass of KI (M.M=166g/mol) in grams required to prepare 500mL of a 0.80M solution: a. 66.40g b. 369.3g c. 33.2g d. 486.1g 7- Which one of the following reactions has a net ionic equation: a. idii b. i\& iii c. idcii\&iii d. iii\&ii 8- For the following reaction: 4Na(s)+O2(g)2Na2O(s), the reducing agent is: a. Na b. O2 c. Na2O d. this is not a redox reaction 9. The empirical formula of a compound is (CH). At 200C,0.241g of this compound occupies 120mL at a pressure of 562.2 torr. What is the molecular formula of the compound? a. C6H6 b. C8H8 c. C4H4 d. C10H10 10- The correct order of increasing ionic radius is: a. N3