6) Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s) + H2O(1) - Ca(OH)2(S) (etrring PM) soford) sighing 2.00-g sample of CaO is reacted with 1.93 g of H20. How many grams of water remain after the reaction is complete? 0 .8 A. 0.00 g B. 0.00396 g C. 1.29g D. 1.04g E. 0.0714 8 7. Write a balanced equation to show the reaction of aqueous aluminum acetate with aqueous ammonium phosphate to form solid aluminum phosphate and aqueous ammonium acetate. A. Al(C2H302)2(aq) + (NH4)2P04(aq) - AIPO4(s) + 2 NH4C2H302(aq) B. Al(C2H302)2(aq) + (NH3)2P04(aq) - AIPO4(s) + 2 NH3C2H302(aq) C. Al(CO3)2(aq) + (NH3)2P04(aq) - AIPO4(s) + 2 NH3CO3(aq) D. Al(C2H302)3(aq) + (NH4)3P04(aq) - AlPO4(S) + 3 NH4C2H302(aq) E. Al(CO2)3(aq) + (NH4)3PO3(aq) - AIPO3($) + 3 NH4CO2(aq) 8. Balance the chemical equation given below, and determine the number of grams of Mgo that are needed to produce 20.0 g of Fe203. PHOBN Mgo(s) + Fe(s) - Fe203(S) + Mg(s)() (PDHELLS + (po)s( OHgo)dy .5 A. 5.05 g B. 15.1g C. 0.0660 g D. 1.68g8 (PD)DHS + (64 .d E. none of the above notsuban nousbixo oi syode arf 10 14 9 . Determine the molecular formula of a compound that has a molar mass of 122.11 g/mol and an empirical formula of C2H502.brus 05 to g teeth bsoubox nagobyrd A. C2H502 Sboogmono arb B. C6H1506 SHO A C. C3H703 SHO D. C4H1004 E. C8H2008 10. The titration of 25.0 mL of an unknown concentration H2504 solution requires 83.6 mL of 0.12 M LiOH solution. What is the concentration of the H2504 solution (in M)? A. 0.20 M B. 0.40 M C. 0.10 M D. 0.36 M E. 0.25 M 11. What is the concentration of H I in the final solution when 65 mL of a 3.0 M HI solution is diluted with pure water to a total volume of 0.15 L? A. 6.9 x 10-3 M B. 1.3 M C. 6.9 M D. 1.3 x 103 M E. 17 M 4

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