Classify the following reactions as: combination, decomposition, single replacement or double replacement: CaCl2 + NA2CO3 → CaCO3 + 2 V [ Choose ] decomposition single replacement double replacement NaCl Zn + S ZnS combination Fe + CUSO4.→ FeSO4 + Cu [ Choose ] 2 HgO → 2 Hg + 02 [ Choose ] >
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- Which of the following is not true? 1. Catalytic converters facilitate both oxidation and reduction reactions simultaneously. 2. Carbon-based compounds (usually CO and hydrocarbons) are reduced in a catalytic converter to yield CO2 and H2O. 3. Reducing the nitrogen in NO (to yield N2 and O2) is energetically favorable, but because the activation energy is high, the reaction must either be catalyzed or done at high temperatures to proceed appreciably. 4. CO and other incompletely oxidized forms of carbon are produced in greater quantities when gasoline is combusted with inadequate oxygen present. 5. Catalytic converters that reduce the nitrogen in NO can also reduce the sulfur in SO2, resulting in the production of the toxic gas H2S when sulfur is present in the fuel.What reaction is SeCI6 + O2 > SeO2 + 3CI2Identify the reaction type shown and describe the clues that were used to identify it. Fe2O3 + 2SiO2 → Fe2Si2O7
- Identify the reactant that gets oxidized in the following reaction. 2CIO3- (aq) + C2O42- (aq) + 2H2O(l) → 2ClO2(g) + 2CO2(g) + 4OH- (aq)Cyanobacteria are chemosynthetic organisms that reside deep in the ocean near hydrothermal vents. Archeoglobus, one of these types of cyanobacteria, uses the pathway shown in the chemical equation. 4H2 + SO42− + 2H+ → H2S + 4H2O Based on this equation, which explanation best describes how the process of chemosynthesis in bacteria differs from photosynthesis, and why can this process occur in the absence of oxygen? Chemosynthesis uses H2 as an energy source, while photosynthesis uses the Sun as an energy source. Chemosynthesis uses H+ as an energy source, while photosynthesis uses the Sun as an energy source. Chemosynthesis reduces a sulfate molecule in the absence of oxygen and light, while photosynthesis depends on light to reduce carbon dioxide. Chemosynthesis oxidizes a sulfate molecule in the absence of oxygen and light, while photosynthesis depends on light to reduce carbon dioxide.Consider the following energy plots for a chemical reaction when answering the questions below. a. Which plot (purple or blue) is the catalyzed pathway? How do you know? b. What does E1 represent? c. What does E2 represent? d. Is the reaction endothermic or exothermic?
- Which of the following is an example of a catalyst? dNTP's used as building blocks for a new DNA strand synthesized in a PCR reaction. Enzymes in your saliva that increase the rate of the breakdown of food molecules A compound that is produced in the final step of a reaction mechanism, and appears as a product in the net reaction. Phenolphthalein indicator used in acid/base titrations. Carbon dioxide in a combustion reaction, such as the burning of biodiesel. NextWhat is the Ksp for the following reaction if the concentration of La3+ was measured to be 9.2 × 10-6 M and F− was measured to be 2.8 × 10-5 M? LaF3(s) ⇌ La3+(aq) + 3 F−(aq)Which is the oxidant in the reactant side for each of the following reactions. Use the change of its oxidation numbers from the reactant to the product to identify it. (a) KH + H2O ---> KOH + H2 (b) 2 KClO3 + 3 C ---> 2 KCl + 3 CO2(g)
- Oxygen gas speeds up the rate at which food is spoiled. To improve the shelf-life of foods, food manufacturers use several methods to remove oxygen from inside the food packaging. In one method, an enzyme is added that catalyzes a reaction between oxygen and glucose which is often present in foods. (glucose + oxygen + water --> gluconic acid + hydrogen peroxide). Why this method may NOT be suitable to improve the shelf-life of all foods?For [Ni(bpet)(CH3CN)2]2+, also designated as [LNiII]2+, what two things must be added in order for it to catalytically generate hydrogen? Group of answer choices electrons and H+ ions acetonitrile and OH- ions H+ ions and a Cu salt electrons and OH- ionsWhich one of these reactions would be best classified as irreversible? a) FeCO3(s) ⇌ Fe2+(aq) + CO32-(aq) K = 2.1 × 10-11 b) HC2H3O2(aq) + OH-(aq) ⇌ C2H3O2-(aq) + H2O(l) K = 1.8 × 10^9 c) Fe3+(aq) + SCN-(aq) ⇌ FeSCN2+(aq) K = 215 d) 2SO2(g) + O2(g) ⇌ 2SO3(g) K = 4.32