2 Cu, S s(s).-30.(g)-2cu,0(s)-250,(g) 2 Cu, O +2 SO, In the second step, copper(1) oxide and carbon react to form copper and carbon monoxide: cu,o(s)-c(s)-2ca(s)-co(g) Write the net chemical equation for the production of copper from copper(1) sulfide, oxygen and carbon. Be sure your equation is balanced. ローロロ

2 Cu, S s(s).-30.(g)-2cu,0(s)-250,(g) 2 Cu, O +2 SO, In the second step, copper(1) oxide and carbon react to form copper and carbon monoxide: cu,o(s)-c(s)-2ca(s)-co(g) Write the net chemical equation for the production of copper from copper(1) sulfide, oxygen and carbon. Be sure your equation is balanced. ローロロ

Living By Chemistry: First Edition Textbook

1st Edition

ISBN:9781559539418

Author:Angelica Stacy

Publisher:Angelica Stacy

ChapterU6: Showtime: Reversible Reactions And Chemical Equilibrium

SectionU6.2: How Backward: Reversible Reactions

Problem 7E

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Substances that poison a catalyst pose a major concern for many engineering designs, including those for catalytic converters. One design option is to add materials that react with potential poisons before they reach the catalyst. Among the commonly encountered catalyst poisons are silicon and phosphorus, which typically form phosphate or silicate ions in the oxidizing environment of an engine. Group 2 elements are added to the catalyst to react with these contaminants before they reach the working portion of the catalytic converter. If estimates show that a catalytic converter will be exposed to 625 g of silicon during its lifetime, what mass of beryllium would need to be included in the design?
Amoxicillin is an antibiotic packaged as a powder. When it is used to treat babies and small animals, the pharmacist or veterinarian must suspend it in water, so that it can be administered orally with a medicine dropper. The label says to dispose of unused suspension after 14 days. It also points out that refrigeration is required. In the context of this chapter, what is implied in the latter two statements?
Determine rxnH 25 C for the following reaction: NO g O2 g NO2 g This reaction is a major participant in the formation of smog.
One of the components of polluted air is NO. It is formed in the high-temperature environment of internal combustion engines by the following reaction: N2(g)+O2(g)2NO(g)H=180KJ Why are high temperatures needed to convert N2 and O2 to NO?
The conversion of natural gas, which is mostly methane,into products that contain two or more carbon atoms, suchas ethane (C2H6), is a very important industrial chemicalprocess. In principle, methane can be converted into ethaneand hydrogen: 2 CH4(g)----->C2H6(g) + H2(g) In practice, this reaction is carried out in the presence ofoxygen: 2 CH4(g) + 12O2(g)---->C2H6(g) + H2O(g) (a) Calculate K for these reactionsat 25 °C and 500 °C. (b) Is the difference in ΔG° forthe two reactions due primarily to the enthalpy term (ΔH)or the entropy term 1-TΔS2? (c) Explain how the precedingreactions are an example of driving a nonspontaneousreaction, (d) The reaction of CH4 and O2 to form C2H6 and H2O must be carried out carefully to avoid a competingreaction. What is the most likely competing reaction?
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The annual production of HNO3 in 2013 was 60 million metric tons Most of that was prepared by the following sequence of reactions, each run in a separate reaction vessel. (a) 4NH3(g)+5O2(g)⟶4NO(g)+6H2O(g) (b) 2NO(g)+O2(g)⟶2NO2(g) (c) 3NO2(g)+H2O(l)⟶2HNO3(aq)+NO(g) The first reaction is run by burning ammonia in air over a platinum catalyst. This reaction is fast. The reaction in equation (c) is also fast. The second reaction limits the rate at which nitric acid can be prepared from ammonia. If equation (b) is second order in NO and first order in O2, what is the rate of formation of NO2 when the oxygen concentration is 0.50 M and the nitric oxide concentration is 0.75 M? The rate constant for the reaction is 5.8 ×× 10−6 L2 mol−2 s−1
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The exhaust systems of cars today are equipped with catalytic converters that uses rhodium and platinum as catalysts. No more than 4-9 grams of these precious metals are used in a single converter. This catalyst speeds up reaction of three types of toxic compounds given off the cars. The rhodium and platinum as catalysts do not enter into a chemical reaction, but the rough surface of the catalyst provides a high-surface area for the reaction to occur. Catalytic converters change unburned hydrocarbons, carbon monoxide, and nitrogen oxides into harmless compound. Why is it not necessary to add more rhodium and platinum to a catalytic converter as these substances are used?
The white powder of LiHCO3 is unstable and when heated the following reaction occurs: 2LiHCO3(s) → Li2CO3(s) + H2O(g) + CO2(g) A student performed a controlled experiment in which he heated 2.3 grams of LiHCO3 powder and collected the gases into a 1.4-liter container. At the end of the reaction the temperature in the tank was 350 ° C 1.a. Calculate how many grams of Li2CO3 were obtained at the end of the reaction. 1. b. Calculate the tank pressure at the end of the reaction. 1.c. Calculate the partial pressure of CO2 in the tank at the end of the reaction. 2. Answer the following questions for the reactants: CO2, H2O, Li2CO3, LiHCO3 a. Determine which of them has the weakest intermolecular forces. b. Determine which of the substances is a molecular substance with a constant dipole. c. Determine the systematic name for the ionic substances.
Excess iron in the body, or hemochromatosis,can cause serious cell damage. One way to treat excess iron build up is to administer small molecules with a high affinity for iron. The small molecules form a complex ion with the iron, thus allowing the iron to be excreted. One small molecule that could be used to treat excess iron, L (M = 598.60 gmol-1), is shown on the right. The reaction between Fe3+ and L is: Fe3+(aq)+?(aq)⇌ Fe?3+(aq) Kf =4.68×1025 A 1.00L solution of 1.00 g/L of Fe3+(aq) has 1.00 mol of L added. What is the equilibrium concentration of iron(III), (i.e.,[Fe3+]eq) in the final solution?
*Stoichiometry Ethylene oxide, C2H4O, may be made by passing ethylene, C2H4, and air over a catalyst at 2500C. When the resulting mixture is cooled and passed through water, the ethylene oxide combines with water to form ethylene glycol (CH2OH)2. In one experiment a 5% by volume ethylene – 95% by volume air mixture is passed over the catalyst. Some of the ethylene does not react, some forms ethylene oxide, and some is oxidized completely to form CO2 and water vapor. The entire gas mixture enters directly into an absorption system where it is contacted by water. The gases leaving the absorber contain all the N2, unreacted C2H4, unused O2, and the CO2 formed. They are saturated with water vapor at a partial pressure of 15.4 mm Hg. The total pressure is 730 mm Hg. An Orsat Analysis of the gases leaving the absorber shows 1.075% C2H4, 80.7 % N2 ad 4.30% CO2. One mole of liquid water is fed to the absorber per 100 moles of the gas fed to the catalyst chamber. What is the composition (%mole)…