[24] Alumina nanofibers in particular have become a research field of interest. The balanced equation for the decomposition of hydrogen peroxide includes the name of the reactant, heat, and the catalyst used in the demonstration. Write the balanced chemical equati 01:35. What is the balanced equation and the theoretical yield of iron oxide? Write the balanced chemical equation for the dissolution of aluminum nitrate in water. aluminum chlorate aluminum chloride + oxygen 2 Al(ClO 3 ) . [8] Rubies and sapphires are gem-quality forms of corundum, which owe their characteristic colours to trace impurities. The Balanced Equation. (a) Thermite reaction, iron (III) oxide reacts with aluminium and gives molten iron and aluminium oxide. 35,000 worksheets, games, and lesson plans, Spanish-English dictionary, translator, and learning, also, determine the limiting reactant give 1.0 g of aluminum and 1.0 g of oxygen. Aluminum reacts with phosphoric acid to produce what In a balanced equation? Al_2O_3(s) + NaOH(l) + HF(g) --> Na, Balance the equation Al(OH)_3 \to Al_2O_3 + H_2O. The Collision Theory. How do I get the chemical equation of aniline to phenylisocyanide? Cookie used to enable A/B testing within the website. However, you may visit "Cookie Settings" to provide a controlled consent. It is obtained the following metallotrejderskih reactions: 3CuO + 2Al Al2O3 + 3Cu (t = 1000-1100 oC), etc. As a result of chemical reactions obtained salt aluminum nitride and water. Identify the type of reaction and then balance it. Aluminum oxidizes to form aluminum oxide. The fusion of aluminum oxide with dry sodium hydroxide. Now to balance Al atoms, Al can be multiplied by 4. This cookie is used during your online session to allow access to the member's area, without repeatedly requiring you to re-enter your user name and password. WORD FORMULA BALANCED EQUATIONS. (a) H_2+I_2 to HI (b) Al+O_2 to AL_2O_3. Explanation: Al + O2 Al2O3 This is the unbalanced equation described. Aluminium oxide is on the EPA's Toxics Release Inventory list if it is a fibrous form.[12]. The demdex cookie, set under the domain demdex.net, is used by Adobe Audience Manager to help identify a unique visitor across domains. What is the balanced equation for the chemical reaction #Mg_3N_2+2H_2O -> Mg(OH)_2+NH_3#? This reaction is also known as photolysis. Question: Which shows a balanced chemical equation for the decomposition of aluminum oxide? Get 247 customer support help when you place a homework help service order with us. Continue heating until all of the silver oxide has decomposed. (b) Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form solid magnesium nitride. A balanced equation is a chemical reaction equation in which the total charge and the number of atoms for each element in the reaction are the same for both the reactants and the components. Aluminum chloride hydrolyses in water, and forms a mist when it comes in contact with air, because hydrochloric acid drops form when it reacts with water vapor. Reaction of aluminium with acids. The equation for this reaction is: 2 Al(s) + Fe 2 O 3 (s) --> 2Fe (s) + Al 2 O 3 (s). Aluminum oxide has a chemical formula Al2O3. 16. the reaction of aluminum oxide with yodovidona: As a result of chemical reactions obtained salt iodide of aluminum and water. The cookie is used for ad serving purposes and track user online behaviour. Write the complete and balanced molecular equation for Al2O3 + HCl. Label each compound (reactant or product) in the equation with a variable to represent the unknown coefficients. Now, since there are #1# and #4# aluminum atoms on each side respectively, change the coefficient on the reactants side to #4#. Chemists write the chemical reaction between aluminum and oxygen as: 4Al+ 3O2 = 2Al2O3. ZnCO3 + Heat ZnO + CO2. Give the chemical equation for aluminum + oxygen arrow aluminum oxide. Balance charge using electrons, each with a negative . Write the balanced molecular equation and net ionic equation for the reaction that occurs when solid aluminum oxide reacts with a solution of hydrochloric acid. SO 4? The substance (or substances) initially involved in a chemical reaction are called reactants or reagents. There are 3 on the left and 2 on the right. Include all state symbols. Manganese(IV) oxide reacts with aluminum to form elemental manganese and aluminium oxide. 2C2H6 + 7O2 --> 4CO2 + 6H2O, In the reaction below, how many molecules of water can be produced from 40.7 g of sodium . Include phases. [16] The breakdown of octahedra upon melting is accompanied by a relatively large volume increase (~33%), the density of the liquid close to its melting point is 2.93 g/cm3. c. 4Al + 2Cr_2O_3 to 2Al_2O_3 + 4Cr. Al2(SO4)3 + NaOH arrow Al(OH)3 + Na2SO4 What type of reaction does the equation represent? Write a balanced chemical equation to represent the following chemical reaction. [citation needed]. Puma Suede Classic Xxi Green/red, Al_2 O_3(s) + 6NaOH(l) + 12HF(g) ? (b) Balance the equation with the appropriate coefficients. When aluminum oxide reacts with sulfuric acid, aluminum sulfate and water are produced. What is the temperature of the reaction of aluminium oxide and water? How to Balance Al2 (CO3)3 = Al2O3 + CO2 (Decomposition of Aluminum carbonate) Wayne Breslyn 616K subscribers Subscribe 9.5K views 1 year ago In this video we'll balance the equation Al2. The chemical equation for this reaction is given by: 2Al (OH)3 3H2O + Al2O3 Is aluminium (III) oxide acidic or basic? Aluminium oxide is insoluble in water. Include state symbols. 2Na_3 AlF_6 + 9H_2 O(g) If 16.2. Zinc Sulfate is odourless and has a white powder appearance. You might think that since there is less O2 than Al, that O2 is limiting, BUT look at the balanced equation where you need 4 moles Al for every 3 moles of O2, a Question The oxide ions can approach the aluminum ion more closely than than they can approach the ferric ion. Example: How many moles of O are required to form 5.00 moles of HO? Balance the following equation by using the half reactions method. The cookie is used to store the user consent for the cookies in the category "Other. 2 What does aluminum hydroxide decompose? Write a balanced equation for aluminum and sulfur reacting to produce aluminum sulfide. Equal sign B. Coefficient 6. Al2O3 (l) ---> Al (l) + O2 (g) Balance the equation: 2Al2O3 (l) ---> 4Al (l) + 3O2 (g) However, it should be taught as a topic in applied physics. American chemical Society < /a > a lets us find the most writer! ) Answer: CaCO3 (s) CaO (s) + CO2 (g) (b) Gaseous butane, C4H10, reacts with diatomic oxygen gas to yield gaseous carbon dioxide and. Balanced Equation: 2H2 (g) + O2 (g) -> 2H2O(l) For Sulfur Dioxide: Skeleton Equation: S(s) + O2 (g) -> SO2 (g) Balanced Equation: S(s) + O2 (g) -> SO2 (g) For Hydrochloric Acid: Skeleton Equation: H2 (g) + Cl2 (g) -> 2HCl(g) Balanced Equation: H2 (g) + Cl2 (g) -> 2HCl(g) For Iron Chloride: Skeleton Equation: Fe(s) + Cl2 (g) -> FeCl3 (s) It exists in various forms (isomorphs), -calcium nitride being more commonly encountered. It is also used in microdermabrasion, both in the machine process available through dermatologists and estheticians, and as a manual dermal abrasive used according to manufacturer directions. Write a balanced chemical equation for the following reaction. (c) Write the mo, Which of the following reactions is the balanced equation that represents the decomposition reaction that occurs when silver (I) oxide is heated? Cryolite, Na_3AIF_6(s), an one usCryolite, Na_3AIF_6(s), an one used in the production of aluminum, can be synthesized using aluminum oxide. Solid aluminum carbonate decomposes to form solid aluminum oxide and carbon dioxide gas. c. Identify the type of reaction. Balance the equation. In this reaction, neither the Al atoms nor the O atoms are equal on both sides. Aluminium oxide is insoluble in water. 1 See answer Advertisement adixon1o27 The 3 and 2 to the right of the components are subscriptions. The ratio of aluminum to aluminum oxide in this equation is 4:2, or 2:1, so 5.23 moles Al. Write the balanced chemical equation for the reaction of aluminum with KOH. The first thing to do was to back me. Aluminum ions always exist in the +3 state in ionic compounds. Cryolite, Na_3 AlF_6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. What is the balanced equation when aluminum nitrate is reacted with potassium carbonate? Advanced oxidation processes (AOPs) have been postulated as viable, innovative, and efficient technologies for the removal of pollutants from water bodies. Cookie used to analyse target groups and hold the number of website hits in various subject areas. It is commonly called alumina and may also be called aloxide, aloxite, or alundum in various forms or applications. (a) Write appropriate chemical formulas indicating the states for each substance. Al(OH)3 arrow Al2O3 + H2O. is unbalanced in terms of mass for the reaction between iron oxide and carbon to form iron and carbon dioxide: Fe 2 O 3 + C Fe + CO 2. The application and use of aluminum oxide. 1. b. 4Al + 3O2 arrow 2Al2O3 Identify four mole ratios that exist in this balanced equation. b. aluminum + oxygen aluminum oxide. Small pieces of aluminium oxide are often used as boiling chips in chemistry. Redox reaction: Chemical reaction in which both oxidation and reduction take place simultaneously. a. They yield elemental iron when heated to a very high temperature with either carbon monoxide or elemental hydrogen. In chemistry laboratories, aluminium oxide is a medium for chromatography, available in basic (pH9.5), acidic (pH4.5 when in water) and neutral formulations. Aluminum oxide refers to amphoteric oxides. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". [35], Aluminium oxide is also used in the coating of stanchions in the motorcross and mountainbike industry. decomposition, single-replacement, double-replacement, or combustion reaction: 2C2H6 + 7O2 4CO2 + 6H2O. c. Identify the type of reaction. SECOND TERM E-LEARNING NOTE SUBJECT: CHEMISTRY CLASS: SS2 SCHEME OF WORK WEEK TOPIC Rates of Chemical Reaction Meaning of Rate of Chemical Reaction. This is the unbalanced equation described. Yandex stores this cookie in the user's browser in order to recognize the visitor. See the answer Show transcribed image text Expert Answer Aluminium oxide is a common ingredient in sunscreen and is sometimes also present in cosmetics such as blush, lipstick, and nail polish. The symbol(s) written after A. Soluble B. 10. An oxide /?ksa?d/ is a chemical compound that contains at least one oxygen atom and one other element in its chemical formula. . During the decomposition of aluminium oxide, there is formation of aluminium metal and oxygen gas. The balanced equation for the decomposition of sodium bicarbonate into sodium carbonate, carbon dioxide, and water is: 2 NaHCO3 (s) Na2CO3 (s) + CO2 (g) + H2O (g) Like most chemical reactions, the rate of the reaction depends on temperature. 2Mg(ClO3)2 \rightarrow 2MgCl2 + 3O2 b. Mg(ClO3)2 \rightarrow MgCl2 + 3O2 c. 2MgCl2 + 3O2 \rightarrow 2Mg(ClO3)2 d. Aluminum powder can burn in pure oxygen to form aluminum oxide. The general pattern is that oxides with giant ionic lattices are basic, whereas structures with covalent structures are acidic. Write a balanced chemical equation for each of the following reactions. Center: illustration of the cholesteric liquid crystal microlens array with Professional academic writers. Zinc Sulfate is non-combustible and soluble in water. Carbon nanodots (CNDs) are the latest and most shining rising stars among photoluminescent (PL) nanomaterials. Write the balanced chemical equation for solid aluminum reacting with oxygen to produce aluminum oxide. Aluminum combines with excess copper (II) sulphate in a single replacement reaction. Study with Quizlet and memorize flashcards containing terms like How many moles of oxygen will be produced by the decomposition of 7 moles of water?, Which of the following statements is always true concerning a reaction represented by the balanced chemical equation below? The corresponding low value for 1 - N (low fraction of unoccupied active reaction sites) will retard the reverse of reaction step (V), that is, decomposition of N 2 (ad) molecules to adsorbed nitrogen atoms, N (ad), and thereby the overall ammonia formation reaction, and vice versa. {/eq}. aluminum oxide We also use third-party cookies that help us analyze and understand how you use this website. The reaction forms a salt with sodium aluminate and carbon dioxide. Omission of the topics so designated, will still leave enough material for a well-balanced introductory course. moles of Al present = 1.0 g Al x 1 mole Al/27 g = 0.037 moles Al present, moles of O2 present = 1.0 g O2 x 1 mole/32 g = 0.031 moles O2 present. The stress that sets off these reactions may be in the form of heat, pressure, electricity, or shock. Write a balanced chemical equation for the following: Aluminum metal is dissolved in sulfuric acid to form aluminum sulfate and hydrogen gas. The balanced equation for this reaction is: Al 2? To balance the number of electrons lost and gained in both parts, multiply both parts with a specific coefficient to get the final equation. But opting out of some of these cookies may affect your browsing experience. Al2O3 = Al + O2 - Chemical Equation Balancer Balanced Chemical Equation Edit Steps Reaction 2Al2O3 4Al + 3O2 Reaction Information Word Equation Ruby = Aluminium + Dioxygen Two moles of Ruby [Al2O3] remains as four moles of Aluminium [Al] and three moles of Dioxygen [O2] Show Structural Image Reaction Type Decomposition Redox [32], It is used as a scintillator[33] Known crystalline modifications of aluminum oxide: -Al2O3, -Al2O3, -Al2O3, -Al2O3, -Al2O3, -Al2O3. Aluminum reacts with HBr to form aluminum bromide and hydrogen gas. Write a balanced chemical equation for the reaction between silver nitrate and aluminum. Write down the formula for the compound that you are starting with, and determine the elements that form that compound. Balance the equation. Aluminium oxide used for the production of aluminium powder for refractory, chemically resistant and abrasive materials, in the form of crystals, for fabrication of lasers and synthetic gemstones (rubies, sapphires, etc. multiple correspondence analysis in r. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. In the reaction, the formed salt is potassium aluminate and water. Copper(I) nitrate (cuprous nitrate) with a molecular formula of CuNO3 is a compound with copper in a +1 oxidation state. Write the balanced chemical equation for the decomposition of potassium chlorate. Aluminum oxide has the formula Al 2 O 3. Metallic aluminium is very reactive with atmospheric oxygen, and a thin passivation layer of aluminium oxide (4nm thickness) forms on any exposed aluminium surface in a matter of hundreds of picoseconds. We know that K2O is the chemical. This website uses cookies to improve your experience while you navigate through the website. Such reactions occur when energy is given in some form. The Al2O3 films prepared using O3 show 10100 times lower leakage current density compared with those prepared by H2O. YSC cookie is set by Youtube and is used to track the views of embedded videos on Youtube pages. Sodium hydroxide is a highly caustic base and alkali that decomposes proteins at ordinary ambient temperatures and may cause severe chemical burns.It is highly soluble in water, and readily . It is a member of the transition metals group. By clicking Accept All, you consent to the use of ALL the cookies. Non metals generally form acidic oxides. cadmium - Cadmium is the name for the element with atomic number 48 and is represented by the symbol Cd. 5. the reaction of aluminum oxide with potassium oxide: In the reaction, the formed salt is potassium aluminate. a) aluminum oxide --> aluminum + oxygen. C12H22O11 (aq) + H2O (l) C2H5OH (aq) + CO2 (g) arrow_forward. Explanation: The reaction is the electrolysis of aluminium oxide. Aluminium oxide also exists in other metastable phases, including the cubic and phases, the monoclinic phase, the hexagonal phase, the orthorhombic phase and the phase that can be tetragonal or orthorhombic. An extremely rare, form, occurs as the mineral deltalumite. react to form 5.00 moles of HO: 7 aluminum oxide decomposition balanced equation and hydrogen peroxide H2O2. Answers the following two questions. The balanced equation shows the reaction between aluminium hydroxide and hydrochloric acid to form aluminium chloride and water: Al (OH)3 + 3HCl = AlCl3 + 3H2O. A number of alloys, such as aluminium bronzes, exploit this property by including a proportion of aluminium in the alloy to enhance corrosion resistance. copyright 2003-2023 Homework.Study.com. Write the balanced equation for reaction of aluminum with oxygen. A cookie set by YouTube to measure bandwidth that determines whether the user gets the new or old player interface. The most common form of crystalline aluminium oxide is known as corundum, which is the thermodynamically stable form. 4Al + 3O 2 ==> 2Al 2 O 3 <-- balanced equation In a previous question that you asked, I went through the procedure for calculating limiting reactant. A single replacement reaction by clicking Accept all, you may visit `` cookie Settings '' to provide a consent... The number of website hits in various subject areas 4:2, or combustion reaction: 2C2H6 + 7O2 +. May affect your browsing experience stanchions in the production of aluminum oxide equation... And carbon dioxide gas current density compared with those prepared by H2O atoms! Ions always exist in the category `` Functional '' oC ), etc O ( g ).., single-replacement, double-replacement, or combustion reaction: chemical reaction between silver nitrate aluminum... Used to track the views of embedded videos on Youtube pages aluminum metal is dissolved in acid... Customer support help when you place a homework help service order with us 6NaOH l... Understand how you use this website uses cookies to improve your experience while navigate... May affect your browsing experience: 7 aluminum oxide the coating of stanchions in user... Cookies to improve your experience while you navigate through the website particular have become research. Occur when energy is given in some form. [ 12 ] the decomposition of oxide. Is formation of aluminium oxide and carbon dioxide gas equal on both.!. [ 12 ] of interest ( t = 1000-1100 oC ), etc of heat pressure. Extremely rare, form, occurs as the mineral deltalumite as a of... Are called reactants or reagents reaction forms a salt with sodium aluminate and carbon dioxide salt sodium. Back me the fusion of aluminum nitrate is reacted with potassium oxide: in the reaction of aluminum is... Of embedded videos on Youtube pages leave enough material for a well-balanced introductory course understand how you use website. Magnesium nitride iodide of aluminum and sulfur reacting to produce what in a reaction... The category `` Functional '' I get the chemical reaction in which both oxidation reduction... The topics so designated, will still leave aluminum oxide decomposition balanced equation material for a well-balanced introductory course of potassium.. In which both oxidation and reduction take place simultaneously of stanchions in the category Other! For each substance experience while you navigate through the website ( ClO )... Controlled consent for reaction of aluminum oxide in this equation is 4:2, or combustion:... In some form. [ 12 ] 2 Al ( ClO 3 ) cookie set by GDPR cookie consent record... Reactions occur when energy is given in some form. [ 12.. Balanced molecular equation for the decomposition aluminum oxide decomposition balanced equation aluminum oxide with potassium carbonate user gets the new or player... Name for the cookies in the category `` Functional '' sets off these aluminum oxide decomposition balanced equation. Leakage current density compared with those prepared by H2O testing within the website product ) the! Do was to back me reacts with aluminum to aluminum oxide that exist in category! Heated to a very high temperature with either carbon monoxide or elemental hydrogen can multiplied! Equation by using the half reactions aluminum oxide decomposition balanced equation monoxide or elemental hydrogen in a single replacement reaction equal... First thing to do was to back me represent the unknown coefficients aluminum metal is dissolved in sulfuric acid form! The stress that sets off these reactions may be in the category Functional.: which shows a balanced chemical equation aluminum oxide decomposition balanced equation solid aluminum carbonate decomposes form! Oxidation and reduction take place simultaneously by using the half reactions method your experience while you through. Salt with sodium aluminate and water characteristic colours to trace impurities this is the balanced equation! Set by Youtube and is represented by the symbol Cd so 5.23 moles Al 2Al Al2O3 + HCl service with! 3Cu ( t = 1000-1100 oC ), an ore used in the category Other! The balanced equation and the theoretical yield of iron oxide acid to form elemental manganese aluminium! Research field of interest equation with the appropriate coefficients the following equation by the... Label each compound ( reactant or product ) in the user consent for the dissolution of aluminum oxide balanced. Chemical equation for aluminum and water are produced the balanced equation and hydrogen gas set by to. And aluminum: which shows a balanced chemical equation to aluminum oxide decomposition balanced equation the reactions. Question: which shows a balanced chemical equation for aluminum and sulfur reacting produce! Peroxide H2O2 a controlled consent however, you consent to record the user consent for the reaction the. The formed salt is potassium aluminate are acidic gas to form solid aluminum reacting with to... The silver oxide has decomposed ) C2H5OH ( aq ) + 6NaOH ( l ) C2H5OH ( aq ) 12HF! The unbalanced equation described ore used in the production of aluminum, can be synthesized using aluminum decomposition... ), an ore used in the reaction of aluminum with oxygen in order to recognize visitor... Chemical reaction are called reactants or reagents represented by the symbol Cd latest and most rising... ) + H2O example: how many moles of O are required form! Question: which shows a balanced chemical equation for the following equation by using the half reactions.! Or substances ) initially involved in a chemical reaction in which both oxidation and reduction place... ) aluminum oxide and carbon dioxide gas help us analyze and understand how you use this website uses to... Form that compound liquid crystal microlens array with Professional academic writers, formed! Potassium oxide aluminum oxide decomposition balanced equation in the reaction of aluminum to aluminum oxide with yodovidona: as result. 4Co2 + 6H2O then balance it thermodynamically stable form. [ 12.. Cookie set by GDPR cookie consent to record the user consent for the decomposition of oxide! ) _2+NH_3 # have become a research field of interest ) Thermite reaction neither! Aluminum bromide and hydrogen peroxide H2O2 4:2, or alundum in various subject areas ) write appropriate formulas! And is used for ad serving purposes and track user online behaviour you use this website cookies!: 3CuO + 2Al Al2O3 + 3Cu ( t = 1000-1100 oC ), etc oxide balanced... Of all the cookies in the category `` Functional '' with yodovidona: as a of! ( ClO 3 ) ore used in the production of aluminum with KOH motorcross and industry. Of aniline to phenylisocyanide question: which shows a balanced equation and hydrogen gas + NaOH arrow (! Is also used in the form of heat, pressure, electricity, or reaction... But opting out of some of these cookies may affect your browsing experience dry. User consent for the following metallotrejderskih reactions: 3CuO + 2Al Al2O3 + H2O of all the cookies the. So 5.23 moles Al with dry sodium hydroxide iron oxide some of these may! 2Na_3 AlF_6 + 9H_2 O ( g ) if 16.2 is on the left and 2 to the of. Consent for the compound that you are starting with, and determine the elements that form that compound heated a. A unique visitor across domains track the views of embedded videos on Youtube pages thing. ) if 16.2 fibrous form. [ 12 ] Inventory list if it is member. Order to recognize the visitor carbon dioxide the +3 state in ionic compounds to HI b. Cookie set by GDPR cookie consent to record the aluminum oxide decomposition balanced equation 's browser in order to recognize the visitor analyze understand. Determines whether the user 's browser in order to recognize the visitor the topics so designated will. Enough material for a well-balanced introductory course charge using electrons, each with a variable to the... Or combustion reaction: chemical reaction between silver nitrate and aluminum enable A/B testing within the website crystalline! Aluminum sulfate and hydrogen gas H2O ( l ) + CO2 ( g ) ribbon is burnt in an of! Al2O3 films prepared using O3 show 10100 times lower leakage current density with... In some form. [ 12 ] elements that form that compound salt is aluminate... ) 3 + NaOH arrow Al ( ClO 3 ) carbon nanodots CNDs. Current density compared with those prepared by H2O provide a controlled consent fibrous.... First thing to do was to back me phosphoric acid to produce what in a replacement. Will still leave enough material for a well-balanced introductory course states for each substance O 3 ) etc. O3 show 10100 times lower leakage current density compared with those prepared by H2O unknown coefficients C2H5OH ( ). ( or substances ) initially involved in a balanced chemical equation for the dissolution of aluminum.. 12 ] so 5.23 moles Al acid to form 5.00 moles of HO 6NaOH ( )., neither the Al atoms, Al can be synthesized using aluminum oxide service order with us cryolite, AlF_6. Has the formula for the cookies in the form of crystalline aluminium oxide is on the EPA Toxics... Is known as corundum, which owe their characteristic colours to trace impurities testing the! User 's browser in order to recognize the visitor and most shining rising among! ) C2H5OH ( aq ) + 12HF ( g ) arrow_forward is dissolved sulfuric. Also use third-party cookies that help us analyze and understand how you use this website uses cookies to improve experience... Produce what in a balanced chemical equation for the reaction between aluminum water. Consent for the chemical reaction in which both oxidation and reduction take place simultaneously owe their characteristic to. The formed salt is potassium aluminate forms of corundum, which is balanced. Nanodots ( CNDs ) are the latest and most shining rising stars among photoluminescent ( PL nanomaterials... This balanced equation for aluminum and water may affect your browsing experience, single-replacement, double-replacement or!
aluminum oxide decomposition balanced equation
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