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20a. AI + Li2O [2] Li + Al2O3 1 150 g [3] n 23b. Ca(NO3)2 BF3 [1] CaF2 → B(NO3)3 405 g 215 g [2] 9 [3]n
A. How many moles of Al can be produced from 10.87 g of Ag? Al(NO3)3(aq) + 3 Ag(s) → Al(s) + 3 AgNO3(aq) B. What mass of O2 can be generated by the decomposition of 100.0 g of NaClO3? 2NaClO3(s) → 2 NaCl(s) + 3 O2(g) C. What mass of Fe is generated when 100.0 g of Al are reacted? Fe2O3(s) + 2 Al(s) → 2 Fe(s) + Al2O3(s)
Aluminum oxide (Al2O3) is produced according to the following equation. 4 Al(s) + 3 O2(g) → 2 Al2O3(s) If the reaction occurs with an 82.4% yield, what mass of aluminum should be reacted with excess oxygen to produce 45.0 grams of Al2O3? a. 54.6 g Al b. 37.9 g Al c. 35.1 g Al d. 23.8 g Al e. 28.9 g Al How do we solve this problem
1. Balance the following equations. CaCl2 + Hао Ca(OH)2 + HCI a) Al2O3 Al + b) O2 Pb(OH)4 Pb(SOa)2+ Нао c) H2SO4 + C d) Ca3(PO4)2 + Co CaзPz +
Calculate the standard-state entropy for the following reaction: 1 Al2O3(s) + 3 H2(g) ? 2 Al(s) + 3 H2O(l) (If applicable, coefficients of one have been included for clarity.) The standard entropy values are given in the table. S? J/(K?mol) Al(s) 28.0 H2O(l) 189 Al2O3(s) 51.0 H2(g) 131
Calculate the standard-state entropy for the following reaction: 1 Al2O3(s) + 3 H2(g) ⟶ 2 Al(s) + 3 H2O(l) (If applicable, coefficients of one have been included for clarity.) The standard entropy values are given in the table. Formula S∘ J/(K⋅mol) Al(s) 28.0 H2O(l) 189 Al2O3(s) 51.0 H2(g) 131
4. Consider the reaction of aluminum and oxygen: Al(s) + O2(g) Al2O3(s) (i). Which is the limiting reactant if we start with 30.0 g Al and 30.0 g O2? (ii). What is the Theoretical Yield for the reaction? (iii). If 25.85 g of Al2O3 was collected at the completion of the reaction (actual yield), what is the % yield for the reaction? 5. (a). A 1.506-g sample of limestone-containing material gave 0.558 g of...
Which 2 combinations produced a precipitate 1. Ca(NO3)2 (aq) and H2SI4 (aq) 2. Ca(NO3)2 (aq) and Na2CO3 (aq) 3. Ca(NO3)2 (aq) and (NH4)2C2O4 (aq) 4. Ca(NO3)2 (aq) and KIO3 (aq)
Given the following reaction: 4 Al + 3 O2 =====è 2 Al2O3 Find the grams O2 used and the grams Al2O3 made with 855 grams Al and excess O2 Given the following reaction: 4 Al + 3 O2 ====> 2 Al2O3 Find the grams O2 used and the grams Al2O3 made with 855 grams Al and excess O2
Calculate the molar solubility of CaF2 in a solution containing 0.647 M of Ca(NO3)2. The Ksp value for CaF2 is 1.46×10−10. Express the molar solubility to three significant figures and include the appropriate units.