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- The carbon dioxide exhaled in the breath of astronauts is often removed from the spacecraft by reaction with lithium hydroxide 2LiOH(s)+CO2(g)Li2CO3(s)+H2O(l) Estimate the grams of lithium hydroxide required per astronaut per day. Assume that each astronaut requires 2.50 103 kcal of energy per day. Further assume that this energy can be equated to the heat of combustion of a quantity of glucose, C6H12O6, to CO2(g) and H2O(l). From the amount of glucose required to give 2.50 103 kcal of heat, calculate the amount of CO2 produced and hence the amount of LiOH required. The H for glucose(s) is 1273 kJ/mol.4.61 What is actually measured by the octane ratings of different grades of gasoline?4.60 Why are fuel additives used?
- Ethanol, C2H5OH, is a gasoline additive that can be produced by fermentation of glucose. C6H12O62C2H5OH+2CO2 (a) Calculate the mass (g) of ethanol produced by the fermentation of 1.000 lb glucose. (b) Gasohol is a mixture of 10.00 mL ethanol per 90.00 mL gasoline. Calculate the mass (in g) of glucose required to produce the ethanol in 1.00 gal gasohol. Density of ethanol = 0.785 g/mL. (c) By 2022, the U. S. Energy Independence and Security Act calls for annual production of 3.6 1010 gal of ethanol, no more than 40% of it produced by fermentation of corn. Fermentation of 1 ton (2.2 103 lb) of corn yields approximately 106 gal of ethanol. The average corn yield in the United States is about 2.1 105 lb per 1.0 105 m2. Calculate the acreage (in m2) required to raise corn solely for ethanol production in 2022 in the United States.Using the table provided, what is the enthalpy for the reaction shown below: 6H₂(g) + 4NO(g) + CH₂(g) → CO₂(g) + 2H₂O(l) + 4NH3 (9)The reduction of iron(III) oxide to iron during steel-making can be summarized by this sequence of reactions: 2 C(s) + O₂(g) 2 CO (g) K₁ Fe₂O3 (s) + 3 CO (g) = 2 Fe (1) + 3 CO₂ (g) K₂ The net reaction is: K 2 Fe₂O3 (s) +6C(s) + 3 O₂ (g) = 4 Fe (1) +6CO₂ (g) Write an equation that gives the overall equilibrium constant K in terms of the equilibrium constants K₁ and K₂. If you need to include any physical constants, be sure you use their standard symbols, which you'll find in the ALEKS Calculator. K= ロ・ロ ?
- Iron is one of our most important metals since it is cheap and very abundant. Iron can also be mixed with other metals and carbon to produce alloys with specific properties. Many reactions occur in the blast furnace to produce iron, Fe). In the reaction that follows, carbon monoxide, CO(g), which is produced by oxidation of carbon, C(s), reacts with FeO (s). FeO(s) + CO() Fen + CO2(g) Which is the reducing agent in the reaction? a) Fem b) CO(g) Which is the oxidizing agent in this reaction? a)Fe(1) CO(g) 5. 6. b) c) c) FeO(s) FeO (s) d) CO2(g) d) CO2(g)Malachite is a green copper mineral with the formula Cu2CO3(OH)2. It can ber converted into copper metal in a number of ways. One method extracts the metal by reacting the malachite with sulfuric acid to form CuSO4, and then adding iron to the CuSO4 solution which, after they react, forms FeSO4 and copper metal. The balanced chemical reactions are: Cu2CO3(OH)2(s) + 2H2SO4(aq) -> 2CuSO4(aq) + 3H2O(l) + CO2(g) CuSO4(aq) + Fe(s) -> FeSO4(aq) + Cu(s) If the final solution is dried, and 3.28 g of iron sulfate is collected, how many grams of malachite were originally used?Hydrogen is manufactured on an industrial scale by this sequence of reactions: CH4 (g) + H₂O(g) = CO (g) + 3 H₂ (g) K2 CO(g) + H₂O(g) = CO₂ (g) + H₂ (g) The net reaction is: K CH4 (g) + 2 H₂O(g) = CO₂ (g) + 4H₂ (g) Write an equation that gives the overall equilibrium constant K in terms of the equilibrium constants K₁ and K₂. If you need to include any physical constants, be sure you use their standard symbols, which you'll find in the ALEKS Calculator. K= 00 ロ・ロ ? K₁
- Classify each chemical reaction: CH₂ CH₂OH() + 30, (g) 200₂ (g) + 3H₂O(g) reaction FeSO (aq) + PbCl₂ (aq) → FeCl₂ (aq) + PbSO₂ (s) - CaCO3(s) → Cao(s) + CO₂(g) CH₂(g) + 20₂(g) → CO₂(g) + 2H₂O(g) - Explanation Check type of reaction (check all that apply) combination single replacement double replacement Odecomposition combination single replacement double replacement decomposition combination single replacement double replacement decomposition combination single replacement double replacement decomposition X precipitation combustion acid-base precipitation combustion acid-base precipitation combustion acid-base precipitation combustion acid-base S © 2023 McGraw Hill LLC. All Rights ReservThe reduction of iron(III) oxide to iron during steel-making can be summarized by this sequence of reactions: 2C (s) + O, (g) =2 CO (g) K1 Fe,0, (s)+ 3 CO (g) =2 Fe (1)+ 3 CO, (g) K2 The net reaction is: 2 Fe,0, (s)+ 6 C (s)+ 3 O, (g) – 4 Fe (1)+ 6 CO, (g) K Write an equation that gives the overall equilibrium constant K in terms of the equilibrium constants K, and K,. If you need to include any physical constants, be sure you use their standard symbols, which you'll find in the ALEKS Calculator. KBe sure to answer all parts. Write a balanced equation for the following by inserting the correct coefficients (if a coefficient = 1, enter "1" in the provided box). Fe(s) + H20(g) → Fez04(s) + H2(g)
