CHEM 1110 Midterm: Chemistry 1110 2011 Fall Test 3
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Multiple choice: clearly circle the best answer. (40 pts: what is the molecular shape of the h2o molecule? square planar, bent. tetrahedral. trigonal pyramidal. __ c2h4 + __ o2 (cid:198) __ co2 + __ h2o: 3, 2, 4, 6, predict the molecular geometry of the asf5 molecule. Page 2 form a: according to the vsepr theory, the molecular shape of sicl4. Cl: what is the number of lone electron pairs on the central atom sicl4. 2-: 3, 0, 2, 1, which one of the following molecules is nonpolar, h2o, asf5, pcl3, sicl4. Calculations: clearly show all work for full credit. (65 pts --- 5 bonus points!: (10 pts) phosphine, an extremely poisonous and highly reactive gas, will react with oxygen to form tetraphosphorus decaoxide and water. Calculate the mass of p4o10 formed when 225 g of ph3 reacts with excess oxygen. (mm of. Ph3 = 34. 00 g/mol, mm of p4o10 = 195. 00 g/mol)
