Question

elf Assessment 4.1 Manganese(IV) oxide reacts with aluminum to form elemental and oxide: You may want to reference (Page 142) Section 4.2 while completing this problem. Part A What mass of Al is required to completely react with 30.0 g Mn02? O 10.3 g Al O 124 g Al 776 g Al 5.82 g Al

Answer 1

Manganese (IV) oxide reacts with aluminum to form elemental manganese and aluminum oxid ou may want to reference (Page 142) Section 42 while completing this problem. Part A What mass of Al is required to completely react with 30 0 g Mn02? O 10.3 g A O 12.4g Al 9 776g A 582 g Al from the balanced chemical eqaution; 3 mol of MnO2 react with 4 mol of Al metal. No. of mol of MnO2-30.0 86.93-0.345 mol No. of moles of Al needed to react with 0.345 mol of Mn02 (4/3) x 0.345- 0.46 mol Weight of Al needed 0.46 mol x (26.98 g/mol,-12.4 g of Al A student calculates that 52.5 g of product can be prepared from a given set of initial amounts of and produces 48 2 g of product What is the percent yield? the reactants The student then goes into the lab pefoms he experiment View Available Hint(s) Percent yield 0918% 1.09% 109% 91 8% (Actual yield / theoretical yield) x 100 = (48.2 g / 52.5 g) x 100 -91.8 % Suibrnit

Part B Constants 1 Periodic Table Nitrogen and hydrogen gas react to form ammonia according to the reaction What is the limiting reactant? Express your answer as a chemical formula. N2(0) + 3H2(9) 2NH (9) | N2 H2 Submit Part C 1 mol of N2 react with 3 mol of H2 Which reactant is in excess? 2 N2 molecules needed to react with 6 H2 molecules. Express your answer as a chemical formula. 2 N2-2 molecules H2 8 molecules H2