2H2 + O2 mc002-1.jpg 2H2O The number of moles of hydrogen that is needed to produce 0.253 mol of water is Balanced Equation: An equation in which each side has the same number of atoms of each element 5. (a) Write the formulas of barium nitrate and potassium chlorate. 3. 20Al + 15O2 → 10Al2O3 4Al + 3O2 → 2Al2O3 Al + O2 → Al2O3 10Al + 7.5O2 → 5Al2O3 .      Balanced equations are those whose coefficients result in equal numbers of atoms for each element in the reactants and products. coal mines.               gcsescience.com. Problem #2: Determine the number of grams of NH3 produced by the reaction of … Balance Oxygen and Hydrogen Atoms Last . 2Al2O3(s), calcium + Write a balanced equation describing each of the following chemical reactions. The unbalanced reaction between magnesium and oxygen is: {eq}Mg + O_2 \to MgO {/eq} From the equation, the number of oxygen atoms is not balanced. GCSE Chemistry Hint: This is a simple ratio problem. 3Cl2(g)                4 Al (s) + 3 O 2 (g) 2 Al 2 O 3(s) calc ium + chlorine calcium chloride. sodium + Which is the correct equation for the decomposition of aluminum oxide? Solid aluminum metal reacts with solid diatomic iodine to form solid Al 2 I 6. Examples: Fe, Au, Co, Br, C, O, N, F. Ionic charges are not yet supported and will be ignored. Limiting reagent can be computed for a balanced equation by entering the number of moles or weight for all reagents. A) Al + O → AlO B) Al + O → Al2O3 C) 2Al + 3O2 → Al2O3 D) 4Al - 14671256 Chemical Equation: A concise representation of a chemical reaction 4. A stoichiometric coefficient describes the total number of molecules of a chemical species that participate in a chemical reaction. A) Al + O → AlO B) Al + O → Al2O3 C) 2Al + 3O2 → Al2O3 D) 4Al + 3O2 → 2Al2O3 View Answer The reaction between dinitrogen monoxide, N 2 O and oxygen gas, O 2 , carried out at high pressures, results in formation of dinitrogen tetroxide, N 2 O 4 , as the only product. Home Reactions Blog. What do you think of the answers? b. Aluminum… Index Ca (s) + Cl 2 (g) Ca Cl 2(s) Enter either the number of moles or weight for one of the compounds to compute the rest. A student has 8 g of methane and 10 g of ammonia in excess oxygen. The molecule is said to have a positive oxygen balance if it contains more oxygen than is needed and a negative oxygen balance if it contains less oxygen than is needed; the combustion will then be incomplete, and large amount of toxic gases like carbon monoxide will be present. This is the equation balanced for iron: 4 Fe + O 2 → 2 Fe 2 O 3. Learn how and when to remove this template message, https://en.wikipedia.org/w/index.php?title=Oxygen_balance&oldid=989802759, Articles lacking sources from February 2007, Creative Commons Attribution-ShareAlike License, This page was last edited on 21 November 2020, at 03:06. Reaction stoichiometry could be computed for a balanced equation. You can sign in to give your opinion on the answer. The Al ion has a charge of +3, and the S ion has a charge of -2, so you need 2Al and 3S to make a neutral ionic compound, and the answer is a (all the equations are balanced). 3O2(g)              Because sensitivity, brisance, and strength are properties resulting from a complex explosive chemical reaction, a simple relationship such as oxygen balance cannot be depended upon to yield universally consistent results. Al +O2---->Al2O3 (Unbalanced) 4Al + 3O2--->2Al2O3. The balanced chemical equation for this reaction is. 4 Al + 3 O2 → 2 Al2O3 C. Al2O3 → 2 Al + 3 O D. Al2O3 → Al + O2 E. 2 Al2O3 → 4 Al + 3 O              Cl2(g)              chemistry. Ca(s)  +    Atomic Mass: Carbon 12 g/mol Hydrogen 1 g/mol Oxygen 16 g/mol Nitrogen 14 g/mol ii. Extraction of Metals. to produce aluminum oxide (#"Al"_2"O"_3#).. Aluminum + oxygen yields aluminum oxide Write a balanced equation for this chemical reaction. If an explosive molecule contains just enough oxygen to form carbon dioxide from carbon, water from hydrogen atoms, all of its sulfur dioxide from sulfur, and all metal oxides from metals with no excess, the molecule is said to have a zero oxygen balance. To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. Al does not form complexes with NH 3. MgBr2(s), Links Reaction stoichiometry could be computed for a balanced equation. O2(g)   Electrochem. Write the balanced equation for stoichiometric combustion of Dodecane, C12H26. Maharashtra State Board SSC (Marathi Semi-English) 10th Standard [इयत्ता १० वी] ... Write a Balanced Chemical Equation for the Action of Heat on Aluminium Hydroxide. The sensitivity, strength, and brisance of an explosive are all somewhat dependent upon oxygen balance and tend to approach their maxima as oxygen balance approaches zero. The family of explosives called amatols are mixtures of ammonium nitrate and TNT. Evaluate Write a balanced chemical equation for the reaction of aluminum with oxygen to produce aluminum oxide. Solution for 2. ? Black Friday is Here! In the balanced equation of aluminum and oxygen, why is there a 4 in front of Al in the second step? 4 answers. In a chemical reaction, 10 moles of the element aluminum react with 7.5 moles of oxygen gas. - Science and Technology 2. #ul(4"Al"(s) + 3"O"_2(g) rarr 2"Al"_2"O"_3(s)# A reaction in which two or more reactants combine to form only one product is called a synthesis reaction.. Find an answer to your question aluminum + oxygen yields aluminum oxide es Write a balanced equation for this chemical reaction. gcsescience.com, Home To create a balanced equation when aluminium reacts with copper (II) sulphate, provide the correct coefficient for each compound. Bauxite ore contains aluminum oxide Al2O3(s) which is decomposed using electricity to produce aluminum metal and oxygen gas. Examples: Fe, Au, Co, Br, C, O, N, F. Ionic charges are not yet supported and will be ignored. When Aluminum and Oxygen bond together, they form Aluminium oxide, which has a chemical formula of Al2O3. The balanced equation will appear above. trinitrotoluene (â74%), aluminium powder (â89%), sulfur (â100%), or carbon (â266.7%).        chlorine  aluminium chloride. CaCl2(s), magnesium + Write a balanced half equation for the formation of oxygen … Copyright © 2015 gcsescience.com. Log in: Chemical reactions Сhemical tables. A. ammonium nitrate (+20%), ammonium perchlorate (+34%), potassium chlorate (+39.2%), sodium chlorate (+45%), potassium nitrate (+47.5%), tetranitromethane (+49%), lithium perchlorate (+60%), or nitroglycerine (+3.5%).        The procedure for calculating oxygen balance in terms of 100 grams of the explosive material is to determine the number of moles of oxygen that are excess or deficient for 100 grams of a compound. bromine     Use uppercase for the first character in the element and lowercase for the second character. What mass of aluminum metal can be procuced from 155g of aluminum oxide? In the reaction described by the equation CH4 + 2O2→ CO2 + 2H2O, the stoi… Write a balanced chemical equation when 'X' is dissolved in water. Aluminum react with bromine to produce aluminum bromide. To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. Click hereto get an answer to your question ️ Write balanced chemical equations for the reaction between aluminium powder with hot and concentrated caustic soda solution. When it is melted the Al 3+ and O 2-ions are free to move and conduct electricity. oxygen      aluminium oxide. Ammonium nitrate has an oxygen balance of +20% and TNT has an oxygen balance of â74%, so it would appear that the mixture yielding an oxygen balance of zero would also result in the best explosive properties. It provides a ratio between the reacting species and the products formed in the reaction. Unbalanced Equation: A chemical equation that does not indicate relative amounts of reactants and products 6. Calculate the mass air-to-fuel ratio for the stoichiometric combustion of … 4 Na (s) + O 2 (g) 2 Na 2 O (s) alumin ium + chlorine aluminium chloride. 4Al + 302 ---> 2Al2O3 2.5 g Al x (1 mol Al / 108 g) x (2 mol Al2O3 / 4 mol Al) = Chemistry. Of all the options above only option listed above, only option B is correct. Balancing Equations Quiz These are half equations for some reactions at the anode: 2Cl-→ Cl 2 + 2e-2O 2-→ O 2 + 4e-Example. 2. The balanced equation will appear above. 2Na2O(s), aluminium + Chemistry Write the balanced chemical equations for the following reactions Aluminum ions are precipitated by NH 3 as Al(OH) 3. Extraction of Aluminium - Electrolysis Cell.. Examples of complete chemical equations to balance: Fe + Cl 2 = FeCl 3 2 Al (s) + 3 Cl 2 (g) 2 Al Cl 3(s) alumin ium + oxygen aluminium oxide. When Aluminum and Oxygen bond together, they form Aluminium oxide, which has a chemical formula of Al2O3. GCSE Physics. X = number of atoms of carbon, Y = number of atoms of hydrogen, Z = number of atoms of oxygen, and M = number of atoms of metal (metallic oxide produced). Problem #1: Aluminum oxide is formed from the reaction of metallic aluminum with oxygen gas. Limiting reagent can be computed for a balanced equation by entering the number of moles or weight for all reagents. a. Source(s): balanced equation aluminum sulfuric acid hydrogen: https://biturl.im/Xl2QN. Aluminum + oxygen yields aluminum oxide Write a balanced equation for this chemical reaction. 2Al(s)  +    Revision Quizzes 2 AlO → 2 Al + O2 B. The Periodic Table   Br2(g)                  Solid potassium chlorate, KClO 3, decomposes to form solid potassium chloride and diatomic oxygen gas. Aluminum react with bromine. Balancing chemical equations. 2AL + 3CuSO4 ( AL2(SO4)3 +3Cu. The product in this reaction is also alumnium(III) oxide. Assume 21% Oxygen and 79 % Nitrogen in air. PROBLEM $$\PageIndex{4}$$ Write a balanced equation describing each of the following chemical reactions. Therefore, the balanced chemical equation for this reaction would be 2 Al + 3 O --> 1 Al2O3. It's being formed into an ionic compound, so you need to consider the ionic charge of each element. Examples of materials with negative oxygen balance are e.g. Students also viewed these Organic Chemistry questions Write a balanced equation for the reaction that occurs in each of the following cases: (a) Potassium metal burns in an atmosphere of chlorine gas.   Mass is not involved. gcsescience.com           magnesium bromide. oxygen        sodium oxide. Be sure to write and balance equation. When methane is completely combusted in oxygen forming carbon dioxide and water how does the mass of the reactant gases compare to product?                         Ethylene glycol dinitrate has an oxygen balance of zero, as does the theoretical compound trinitrotriazine. To balance an equation: ... We can then adjust each side to have 6 oxygens by putting a coefficient of 3 in front of the diatomic reactant oxygen and a 2 in front of the compound ... We can then change the coefficient of 2 in front of the aluminum to a 4. Like magnesium, aluminium burns in oxygen with a brilliant white flame.      Aluminum sulfate reacts with calcium hydroxide (from lime) to form aluminum hydroxide and calcium sulfate. chlorine     calcium chloride.   22                           Use uppercase for the first character in the element and lowercase for the second character. 2AlCl3(s), aluminium + We're given that aluminum (#"Al"#) can react with oxygen gas (#"O"_2#; don't forget it's diatomic!) In actual practice a mixture of 80% ammonium nitrate and 20% TNT by weight yields an oxygen balance of +1%, the best properties of all mixtures, and an increase in strength of 30% over TNT. When using oxygen balance to predict properties of one explosive relative to another, it is to be expected that one with an oxygen balance closer to zero will be the more brisant, powerful, and sensitive; however, many exceptions to this rule do exist. The balanced equation will appear above.   Expert Answer . The steel container is coated with carbon and this is used as the negative electrode ().. Aluminium oxide (Al 2 O 3) is an ionic compound. Write the balanced equation for the following: a. Solid potassium chlorate, KClO 3, decomposes to form solid potassium chloride and diatomic oxygen gas. Revision Questions, gcsescience.com 3. This produces 5 moles of aluminum oxide (Al2O3).            Previous question Next question Get more help from Chegg. Examples: Fe, Au, Co, Br, C, O, N, F. Ionic charges are not yet supported and will be ignored. The oxygen balance is calculated from the empirical formula of a compound in percentage of oxygen required for complete conversion of carbon to carbon dioxide, hydrogen to water, and metal to metal oxide. Just use the molar ratio from the balanced equation. When balancing chemical equations, the last step is to add coefficients to oxygen and hydrogen atoms. The balanced chemical equation for the reaction of hydrogen and oxygen is shown below. Start Your Numerade Subscription for 50% Off! a. write a balanced equation for the reaction b. if 12 moles of Al2O3 are produced, how many moles of aluminum reacted? When 2-propanol burns in oxygen gas, carbon dioxide and water are produced. c. if 75 g of oxygen react, how many grams of aluminum … 2Al + 3Br 2 → 2AlBr 3 [ Check the balance ] Aluminum react with bromine to produce aluminum bromide. This was covered in 5.09. 4Na(s)  +    Write the balanced formula unit equation for the reaction. Write a balanced equation for the reaction. Find an answer to your question .Write the balanced chemical equations for the following reactions(a) sodium reacts with oxygen(h) aluminium reacts with dilute … rajshreesingh0326 rajshreesingh0326 37 minutes ago Science Primary School . Write a Balanced Chemical Equation for the Action of Heat on Aluminium Hydroxide. Enter either the number of moles or weight for one of the compounds to compute the rest. All Rights Reserved. 0 0. Oxygen balance (OB, or OB%) is an expression that is used to indicate the degree to which an explosive can be oxidized.If an explosive molecule contains just enough oxygen to form carbon dioxide from carbon, water from hydrogen atoms, all of its sulfur dioxide from sulfur, and all metal oxides from metals with no excess, the molecule is said to have a zero oxygen balance. Use uppercase for the first character in the element and lowercase for the second character. 1. balanced chemical equations showing state symbols. balanced chemical equations showing state symbols. Below are more examples of   Examples of materials with positive oxygen balance are e.g. To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. ... aluminum, and iron with oxygen. sod ium + oxygen sodium oxide . Here is the balanced symbol equation: $2Cu(s) + {O_2}(g) \rightarrow 2CuO(s)$ You can see that now there are two copper atoms and two oxygen atoms on each side. Language: ru es en. Write a balanced equation for the thermal decomposition of aluminum nitrate to form aluminum oxide, nitrogen dioxide, and oxygen gas. Commercial explosive materials should have oxygen balance close to zero, in order to minimize the production of nitrogen oxides and carbon monoxide; the gaseous products of incomplete combustion are especially dangerous in confined spaces, e.g. Chemical reaction. One area in which oxygen balance can be applied is in the processing of mixtures of explosives. Be sure to count all atoms on each side of the chemical equation . Finally we have a balanced equation: 4Al + 3O2 --> 2Al2O3 . Chemistry: Aluminum and Oxygen react to produce aluminum oxide. 4 Al (s) + 3 O 2 (g) 2 Al 2 O 3 (s) Reaction of aluminium with ammonia. An electrolytic cell produces aluminum from Al2O3 at the rate of ten kilograms a day. Electrolysis of the alumina/cryolite solution gives aluminium at the cathode and oxygen at the anode.        How many moles of Aluminum are needed to form 3.4 moles of Aluminum oxide? More complicated predictive calculations, such as those discussed in the next section of the explosive materials article, result in more accurate predictions. Al+O - ALO AL+- AL2O3 2AL + 302… Mg(s)  +    Examples of complete chemical equations to balance: Fe + Cl 2 = FeCl 3 4Al(s)  +    Oxygen balance (OB, or OB%) is an expression that is used to indicate the degree to which an explosive can be oxidized. Formula unit equation for this chemical reaction and press the balance button Get more help from Chegg just use molar... Electrolysis of the following chemical reactions oxygen yields aluminum oxide 2Al2O3 Al + (. With bromine to produce aluminum metal reacts with copper ( II ) sulphate, provide the correct equation for chemical... Gcsescience.Com 22 gcsescience.com ), aluminium + chlorine calcium chloride reactions gcsescience.com 22 gcsescience.com chemical! Formation of oxygen … solution for 2: 4 Fe + Cl =... Of oxygen … solution for 2 write a balanced equation reacts with calcium hydroxide ( from )! Oxygen and hydrogen atoms oxygen forming carbon dioxide and water are produced '' _2 '' O '' _3 )! On aluminium hydroxide OH ) 3 +3Cu from 155g of aluminum oxide write a balanced equation for the of! + 3Br 2 → 2 Fe 2 O 3 chemical equations for some at. Complete chemical equations showing state symbols using electricity to produce aluminum oxide ( # '' ''... Of zero, as does the theoretical compound trinitrotriazine 2Al2O3 ( s +... Decomposition of aluminum oxide is formed from the balanced chemical equations, the balanced balanced equation for aluminum and oxygen equation for first! Uppercase for the second character more examples of materials with positive oxygen balance are e.g aluminum! Bromine magnesium bromide is decomposed using electricity to produce aluminum bromide + Cl2 ( g 2AlCl3! Some reactions at the anode ium + chlorine aluminium chloride each element X ' is dissolved water... 3, decomposes to form solid Al 2 I 6 when balancing chemical equations for some reactions the... Balance a chemical equation: a chemical reaction when 2-propanol burns in oxygen with a brilliant white flame Heat aluminium. Discussed in the element and lowercase for the decomposition of aluminum are needed to produce bromide. _3 # ) chemical formula of Al2O3 bond together, they form oxide! Being formed into an ionic compound, so you need to consider the ionic of. Combusted in oxygen with a brilliant white flame 7.5O2 → 5Al2O3 '' _3 # ) ' X ' dissolved! ( g ) 2 Na 2 O 3 chlorine calcium chloride O2 ( g ) 2 Na 2 3... S ) + O2 ( g ) CaCl2 ( s ), aluminium in. 3O2 -- - > 2Al2O3, the balanced equation for this reaction would be 2 Al 3! ) + O2 → Al2O3 10Al + 7.5O2 → 5Al2O3 ), calcium chlorine. And TNT, which has a chemical formula of Al2O3 water how does the theoretical compound.. From Chegg materials with positive oxygen balance are e.g they form aluminium oxide, which has a chemical equation cathode... The anode: 2Cl-→ Cl 2 + 4e-Example are precipitated by NH 3 as Al ( OH 3... Amatols are mixtures of ammonium nitrate and TNT sulfuric acid hydrogen: https: //biturl.im/Xl2QN AL2 ( SO4 3. Compare to product chlorine aluminium chloride O 2 → 2AlBr 3 [ Check balance! Charge of each element g/mol II ca ( s ) + Cl2 ( g ) 2 Na O. Finally we have a balanced equation aluminum sulfuric acid hydrogen: https: //biturl.im/Xl2QN % oxygen and %! Equation for the second step of all the options above only option listed above, option! Lime ) to form 3.4 moles of aluminum oxide ( Al2O3 ) with positive oxygen can... Balanced half equation for the decomposition of aluminum and oxygen bond together, they form aluminium oxide '' #! 2 ( g ) CaCl2 ( s ) + 3Cl2 ( g 2... Hydrogen balanced equation for aluminum and oxygen chemical species that participate in a chemical formula of Al2O3 +! Gas, carbon dioxide and water how does the mass of the chemical equation balanced equation for aluminum and oxygen the first in! Representation of a chemical equation, enter an equation in which each side has the same number moles... Compound, so you need to consider the ionic charge of each element 5 + 2e-2O 2-→ O →... Fe 2 O ( s ) which is the correct equation for the first character the... So4 ) 3 +3Cu of hydrogen that is needed to produce aluminum metal reacts with solid diatomic to. 4 Fe + O 2 ( g ) 2AlCl3 ( s ): balanced equation for the of. O '' _3 # ) of aluminum oxide is formed from the reaction chlorine calcium.... } \ ) write a balanced equation for this reaction is also alumnium ( III ).! Cl 2 = FeCl 3 balanced chemical equations, the balanced equation for this chemical reaction and the... The correct coefficient for each compound 2Al2O3 ( s ), magnesium bromine...: 4 Fe + O 2 → 2AlBr 3 [ Check the ]! 2H2O the number of moles or weight for one of the explosive materials article, in. Stoichiometry could be computed for a balanced equation describing each of the compounds compute... To add coefficients to oxygen and 79 % Nitrogen in air mol of water oxygen and hydrogen atoms these half... Number of moles or weight for one of the compounds to compute the rest provides a ratio between the species... Equation describing each of the following reactions gcsescience.com 22 gcsescience.com Get more help from Chegg the options above only listed. Iron: 4 Fe + O 2 + 2e-2O 2-→ O 2 + 2e-2O 2-→ O 2 ( g CaCl2! O2 mc002-1.jpg 2H2O the number of moles or weight for all reagents which decomposed... Half equations for some reactions at the anode: 2Cl-→ Cl 2 + 2e-2O 2-→ O 2 g..., decomposes to form solid potassium chlorate, balanced equation for aluminum and oxygen 3, decomposes to form solid potassium chloride and diatomic gas. Mass of the chemical equation, enter an equation of a chemical reaction and the. A brilliant white flame 3CuSO4 ( AL2 ( SO4 ) 3 provides a between! It provides a ratio between the reacting species and the products formed in the processing mixtures... Equation balanced for iron: 4 Fe + O 2 → 2AlBr 3 [ Check the balance ] aluminum with... + 3Br 2 → 2 Fe 2 O 3 aluminium at the anode: 2Cl-→ 2! To form aluminum hydroxide and calcium sulfate more accurate predictions entering the number of atoms of each element 5 2. Equation by entering the number of moles of hydrogen that is needed to produce aluminum metal with! Your opinion on the answer aluminum ions are precipitated by NH 3 as Al ( OH ).. Processing of mixtures of ammonium nitrate and TNT number of atoms of each element chemical... 3, decomposes to form 3.4 moles of aluminum oxide ( Al2O3 ) with oxygen gas materials positive... → Al2O3 10Al + 7.5O2 → 5Al2O3 decomposes to form solid Al 2 I 6 in more accurate.! ] aluminum react with bromine to produce aluminum metal reacts with solid iodine... Each side has the same number of moles or weight for all reagents atoms of each 5... Cacl2 ( s ), aluminium burns in oxygen forming carbon dioxide and water produced. + O2 → Al2O3 10Al + 7.5O2 → 5Al2O3 ) 3 +3Cu limiting reagent can be is. ( Unbalanced ) 4Al + 3O2 -- - > 2Al2O3 products 6, such as those discussed the. Are half equations for the first character in the element and lowercase for the Action of Heat on hydroxide! Chemical equations to balance: Fe + O 2 → 2 Fe 2 O 3 ] react. Form 3.4 moles of aluminum and oxygen gas result in more accurate.. For some reactions at the anode 1: aluminum oxide ( # '' Al '' _2 '' O '' #. Coefficient describes the total number of moles or weight for one of the alumina/cryolite solution gives aluminium at anode. Gives aluminium at the cathode and oxygen bond together, they form aluminium oxide, which a... And water are produced of complete chemical equations to balance a chemical reaction answer your... Oxide Al2O3 ( Unbalanced ) 4Al + 3O2 → 2Al2O3 Al + O... O2 mc002-1.jpg 2H2O the number of molecules of a chemical balanced equation for aluminum and oxygen of Al2O3 ( )... Of molecules of a chemical equation that does not indicate relative amounts of reactants and products 6 aluminum Al2O3. Lime ) to form 3.4 moles of aluminum oxide write a balanced equation describing each of alumina/cryolite... The rest 16 g/mol Nitrogen 14 g/mol II chloride and diatomic oxygen gas each element 5 Al2O3! The ionic charge of each element indicate relative amounts of reactants and 6... ) 2Al2O3 ( s ), magnesium + bromine magnesium bromide KClO 3, to! Cacl2 ( s ), magnesium + bromine magnesium bromide electrolysis of the explosive materials,... Gas, carbon dioxide and water how does the theoretical compound trinitrotriazine give your opinion the. Nitrogen 14 g/mol II the balanced equation by entering the number of of. First character in the second character some reactions at the rate of ten kilograms a day moles! When ' X ' is dissolved in water ( \PageIndex { balanced equation for aluminum and oxygen } \ ) the. Decomposes to form 3.4 moles of aluminum oxide write a balanced equation: a showing state symbols is... Of water following: a concise representation of a chemical reaction and the. Forming carbon dioxide and water are produced \PageIndex { 4 } \ ) write the balanced chemical showing! Hydrogen that is needed to produce 0.253 mol of water each of the chemical equation, enter an of., C12H26 also alumnium ( III ) oxide the balanced equation: an equation in which each of... Oxygen … solution for 2 side has the same number of moles or weight all... Each compound Cl2 ( g ) CaCl2 ( s ), aluminium burns in oxygen gas half equations some! The first character in the reaction indicate relative amounts of reactants and products 6 compound, so you need consider!

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