Looking at this reaction @ STP: 4 Fe (s) + 3 O2 (g) à 2 Fe2O3 (s) if you heat 1.50 moles of Fe, how many moles of Fe2O3 are made? 1.50 moles 2.25 moles 0.75 moles 3.00 moles None of the above

Exercise 1 It is desired to reduce the 2% CO, in 23 Ib/sec of a natural gas stream using absorption in aqueous diethylamine flowing at 40 lb/sec. Either 1 ½ in. Raschig rings or 1 ½ in. Pall rings are being considered for packing. A pressure drop of 0.25 in H,O/ft is desired to minimize foaming. Under operating conditions, the densities of the gas and the liquid are 2.8 and 63 Ib/ft³, respectively; the liquid viscosity is 2 centistokes. "Determine the flooding velocity and the tower's cross-sectional area using the succeeding procedures

1. An impure sample of compound A is contaminated with two impurities B and C. The sample is to be purified by recrystallization using ethanol as the solvent. The solubility properties of the three components are summarized below. Solubility in Solubility in ethanol Solubility in 50 mL Solubility in 50 mL ethanol at -78 °C at - 0°C ethanol at -78 °C ethanol at - 0°C (g) (g) Compound A 0.12 g/mL 0.02 g/mL Impurity B 0.58 g/mL 0.04 g/mL Impurity C 0.005 g/mL 0.0003 g/mL The impure (7.5 g) sample contains 5.0 g of compound A, 1.5 g of B and 1.0 g of C and is recrystallized using 50 mL of ethanol. The sample is boiled with 50 mL of ethanol, filtered by gravity and then cooled in ice and filtered by suction. a) How much compound A should be obtained as the final product? Will the sample be contaminated with any of the impurities? Explain (using calculations to support your answer-fill in the missing masses in the table above). Hint: For this question you should calculate the mass of each…

Predict the product when the two substances mix. If the reaction occurs, write the balanced chemical equation. If the reaction does not happen, write "NA" A solution of nickel(III) nitrate is mixed with a solution of sodium hydroxide.