Chemistry > EXAM REVIEW > CHEM 120 FINAL EXAM practice problems | FINAL EXAM REVIEW (All)

CHEM 120 FINAL EXAM practice problems | FINAL EXAM REVIEW

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2. Which of the following elements a) is a main group element: Mn, Ag, Co, F, La ______________ b) exists as a diatomic molecule: He, N, Al, P, Hg ______________ c) is a transition element: B, S, ... Cr, Ne, Sr _____________ d) is a noble gas: H, Be, F, Ar, Au ___________ e) is a metalloid: O, C, Ti, Ge, Cl ___________ f) most likely to gain an electron when forming an ion Na, Mg, Al, Br, He ______________ 3. Indicate the charges of the following ions: a) an ion formed from Ba: ______ b) an ion formed from N: _________ c) ions formed from alkali metals: ___________ d) Co in an ionic compound CoCl2: ___________ e) Fe in an ionic compound FeSO4: ___________ 4. Write the formulas for each of the following ionic compunds: a) an ionic compound formed from the cation A+ and anion B3 ___________________ b) potassium phosphate: ___________ c) ammonium sulfide: ______________ 5. Predict whether each of the following compounds is ionic or molecular and name the compound: CBr4 Li2O CuCO3 Label them as ionic or molecular Name the compound 6. Balance the following chemical reactions: a) PbS + O2 fi PbO + SO2 b) C2H4P+ O2 fi Co2 + H2O 7. Write a combination reaction of aluminum metal with chlorine gas that forms a solid product. Write and balance the chemical equation for this reaction. Indicate the state of each substance. 8. There are two different compounds of sulfur and fluorine. In SF6, the mass of fluorine per gram of sulfur is 3.55 g F/g S. In the other compound, SFx, the mass of fluorine per gram of sulfur is .28 g F/g S. What s the value of X for the second compound? [Show More]

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