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review 4-7 answers - Review Ch 5 Chem 100 Instructor Anna...

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Review Ch 5 Name:______ Key ________________ Chem 100 Instructor: Anna Toy-Palmer Name the following molecules: 1. CBr 4 _________________ carbon tetrabromide ____________________________ 2. SnCO 3 _______________ tin (II) carbonate ______________________________ 3. Co(C 2 H 3 O 2 ) 2 __________ cobalt (II) acetate ___________________ 4. BCl 3 ___________ boron trichloride ________________________ 5. Fe 2 S 3 __________ iron (III) sulfide _____________________ 6. H 2 CO 3 _________ carbonic acid ____________________________ 7. SF 6 _____________ sulfur hexafluoride _______________________ 8. K 2 CrO 4 __________ potassium chromate ______________________ 9. BaSO 4 ___________ barium sulfate _______________________ 10. Pb(Cr 2 O 7 ) 2 ________ lead (IV) dichromate ____________________________ 11. PBr 5 _____________ phosphorus pentabromide ____________________ 12. H 2 SO 4 ___________ sulfuric acid _____________________ 13. Zn(NO 3 ) 2 _________ zinc nitrate ____________________________ 14. K 2 CrO 4 ___________ potassium chromate ________________________ 15. SiO 2 ____________ silicon dioxide _______________________ 16. CsHCO 3 __________ cesium bicarbonate _ or cesium hydrogen carbonate _______ 17. Zn __________ zinc_ _______________________________ 18. HCl ______ hydrochloric acid_ __________________________________ 19. Na 3 PO 4_________________ sodium phosphate _________________________________________________ Write the molecular formulas: 20. Sulfur dioxide _________ SO 2 ________________________________ 21. Sulfurous acid ____________ H 2 SO 3 ______________________________ 22. Nitrogen gas _______________ N 2 _____________________________ 23. Acetic acid _______________ HC 2 H 3 O 2 _ ______________________________ 24. Aluminum chloride__________ AlCl 3 ______________________________ 25. Mercury (I) phosphate________ (Hg 2 ) 3 (PO 4 ) 2 _____________________________ 26. Hypochlorous acid__________ HClO ______________________________ 27. Silver iodide_______________ AgI ___________________________ 28. Barium sulfite_______________ BaSO 3 __________________________ 29. Calcium bicarbonate___________ Ca(HCO 3 ) 2 __________________________ 30. Lead (IV) chloride_______________ PbCl 4 _______________________ 31. Sodium permanganate___________ NaMnO 4 _________________________ 32. Hydrobromic acid______________ HBr _____________________________ 33. Cobalt (III) nitrate____________ Co(NO 3 ) 3 ______________________________ 34. Solid copper__________________ Cu ___________________________ 35. Oxygen gas __________________ O 2 __________________________ 36. Iodine _______________________ I 2 ________________________ 37. Magnesium sulfate ___________ MgSO 4 ___________________________ 38. phosphoric acid ____________ H 3 PO 4 _____________________
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True/False Questions 39) When elements combine to form compounds, their properties only change slightly. Answer: FALSE 41) The law of constant composition states: All samples of a given compound have the same proportions of their constituent elements. Answer: TRUE 42) Molecular elements do not exist in nature. Answer: FALSE 44) The basic unit of an ionic compound is called the formula unit. Answer: TRUE 45) SO 2 is an ionic compound. Answer: FALSE 46) Ionic compounds have a net charge of zero. Answer: TRUE 47) Ionic compounds always contain positive and negative ions. Answer: TRUE 49) The correct formula for calcium fluoride is CaF 3 . Answer: FALSE 50) Ionic compounds are always made up of a metal and a nonmetal. Answer: TRUE 51) The ionic compound MgO is named manganese oxide. Answer: FALSE 52) The proper name for SF 6 is sulfur tetrafluoride. Answer: FALSE Multiple Choice Questions 32) Which of the following statements about chemical formulas is FALSE? A) The subscripts represent the relative number each type of atom in the compound. B) The subscripts represent the relative mass of each type of atom in the compound. C) The subscripts do not change for a given compound. D) Different compounds made of the same elements have different subscripts. E) All of the statements are true. Answer: B
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