CHEM 1110 Midterm: Chemistry 1110 2011 Spring Test 2
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Part 1: multiple choice (60 pts): clearly circle the correct answer. Which one of the following compounds is soluble in water: feco3, na2co3, caso4, agbr, none of these is soluble in water. What is the net ionic equation for the reaction of h2so4 with nh3: h2so4 + 2 nh3 (cid:198) 2 nh4so4, h2so4 + 2 nh3 (cid:198) 2 nh4, 2 h+ + so4, h2, h+ + nh3 (cid:198) nh4. What volume of 0. 450 m hcl is needed to make 250. ml of 0. 112m hcl: 62. 2 ml, 16. 1 ml, 10. 0 ml, 250. ml, none of these. What is the molecular formula for a compound with molar mass of 360. 3 g/mol and an empirical formula of c7h4o2: c7h4o2, c14h8o6, c16h8o10, c18h16o8, c21h12o6. What is the percent of oxygen in fe(no3)2(cid:149)2h2o? (mm of fe(no3)2(cid:149)2h2o = 215. 90 g/mol: 7. 411% o, 22. 23% o, 44. 47% o, 59. 29% o, none of these.
