Pract-MT1_3_key

0 g of carbon dioxide 23 if 195 g of sodium and

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Unformatted text preview: 20. How much zirconium (in g) is in 0.338 mol of the mineral zircon, ZrSiO4? a. 0.620 g b. 3.08 g c. 6.20 g d. 30.8 g e. 62.0 g Page 6 of 10 21. What are the products of the decomposition reaction caused by the heating of zinc (II) carbonate? a. Zn (s) + CO2 (g) b. ZnO (s) + CO2 (g) c. Zn(OH)2 (aq) and H2CO3 (aq) d. ZnO2 (s) + CO (g) e. None of the above 22. Which statement is NOT true concerning the combustion of methane in the presence of excess oxygen? Assume the reaction yield is 100%. a. The reaction of 16.0 g of CH4 will produce 2.00 moles of water b. The reaction of 16.0 g of CH4 will produce 36.0 g of water c. The reaction of 32.0 g of O2 will produce 44.0 g of carbon dioxide d. One molecule of CH4 reacts with two molecules of oxygen e. 1.00 mole of CH4 will produce 44.0 g of carbon dioxide 23. If 19.5 g of sodium and 46.9 g of chlorine react via a combination reaction, how much excess reactant (in g) remains when the reaction is 100% complete? a. 16.8 g chlorine remains b. 13.2 g chlorine remains c. 10.9 g sodium remains d. 4.3 g sodium remains e. Neither reactant remains 24. Consider the metathesis reaction between Pb(NO3)2 (aq) and KI (aq), in which a precipitate is formed and is separated from the supernatant solution. Which test and observation on the solution allows a definitive conclusion that Pb(NO3)2 is present as the excess reactant? a. Precipitate forms when additional Pb(NO3)2 (aq) is added b. No precipitate forms when additional Pb(NO3)2 (aq) is added c. Precipitate forms when additional KI (aq) is added d. No precipitate fo...
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This note was uploaded on 11/28/2011 for the course CHEM 121 taught by Professor Wyzlouzil during the Spring '07 term at Ohio State.

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