Question

Laboratory Date - Name Section Experiment 9-Pre-lab Questions 1. Balance the following reactions Fe(s) +_ _0.6) F0,0,00 CH, +_ _068) C0,68) +- H,01 NH, 8) + _0.) → NO(g) + H.0(g) C,H,OH() +0.18) H,018) in aluminum (Al) powder, which burns in oxygen (0.) to produce a 2. Toy sparklers often contain aluminum (Al) wide (ALO.) and gives of a bright white light. The balanced reaction is num 4 Al(s) + 30,() +2 A1,0,0) only 2 moles of Al are available to react with abundant oxygen, how many moles of aluminum oxide will be produced? .CO.(3) b. If 3 moles of aluminum oxide are produced, how many moles of aluminum reacted? c. If 3 moles of aluminum oxide are produced, how many moles of oxygen reacted? d. I 25.491 g of aluminum oxide is produced, how many grams of aluminum reacted!

Answer 1

the number of elements For balancing on the left a reaction side 1) For balancing a reaction sum of each bomber of adom on left side should be equal on the right Stoichiometric coefficients are the number an front of the atom used to balance the equation. It is given as cohole number for conversience. a) 4 Fe + 302c9 2 Fe2O3 (8) bo of fe on left – no of Fe an right - 4 no of a on left - no of o on right - 6 6) Calt + 50 - 300 + 4ho (9) (9) ho of c on lef = no of conright = 3 not ton left - 8 - no of it on right = 2xh no of o on left = 5x2 = no of a on right 3x2 + 4x1 = 10 4 NH₃ + 50 → 4 No g + 6H₂O) c) d) 2 C3 H7 0 Hee, + 9 02, 6002 g , + 8 H₂0 g)

2. 4 Als + 3 0 2 2 Al 3 - 4 moles of Als reacts with 3 mole Oro, to give 2 moles Al₂O3 a) 2 mol Al are available Only then the reaction will be 2 Alt 32 Org - 2 A403 mol ₂ Oz is produced 6) 3 mol Al2Oz produced the reaction 3 x 4 Al + 3x30 - 3 Al2O3 3 x 4 = 6 mol Al reacted c) 3 mol Al produced then 3x3 = 4.5 mol O₂ reacted d) 25.401 g AlO3 produced this we need to know molar mass To find of Al₂O3, las mass of Az = 101.96% mo)