4 Al + 3 ... C5H12 + O2 → CO2 + H2O b. N2 + H2 → NH3 c) Mg + O2 → MgO d) MnO2 + Al → Al2O3 + Mn If you want to warm 3.10 g of water from 56.4 C to 82.4 C, how many calories would you need to add to the water? Usually I give a long detailed explanation for these types of problems but I'm tired of explaining it. So divide your 3.08 moles of Oxygen by your 2.80 moles of Al to get l.l So you have l.l moles of oxygen for every one mole of aluminum. O2 is oxygen and it is almost always written as a diatomic molecule. How does that compare with a 3mole oxygen to 4 mole aluminum in the balanced equation. Don't confuse balancing with writing a formula. 2.) Al + O2 -> Al2O3 This is supposed to be a balanced equations but how did it go from 2 oxygens to 3? The chemical equation when aluminum reacts with oxygen is: 4Al + 3O2 --> 2Al2O3. 2. heat reaction equals final minus initial. An equation; 4 Al + 3 → 2 . 4Mole Al to 3 mole O2 (ideal ration) and l mole Al l.l mole O2 … It's the FORMULA. 1.) 3 moles of O2 react with 4 moles of Al to give 2 moles of Al2O3. The trick is the use the molar ratios that you can just easily read from the equation. Previous Next We're in the know . To find : 1. no of moles of oxygen() 2. no of moles of aluminium (Al) We know; 1. Because the numbers of aluminum and oxygen atoms are not the same on both sides of the equation, so the equation is not balanced. 1. Lets see. grams of Al: 2 mol Al x (27 g/ mol Al) = 0.074 g Al. 4 Al +3 02 ---> 2 Al203 or Al2O3 Al2O3. Lots of people have trouble with this. Balance the equation. 4 Al + 3 O 2 = 2 Al 2 O 3 Reaction type: synthesis. 2 mol Al x (3 mol O2/ 4 mol Al) = 1.5 moles of O2. refer to appendix c for delta h values (of the chem regents reference table) Al + O2 -> Al2O3. Aluminum is Al. Reaction stoichiometry: Limiting reagent: Compound: Coefficient: Molar Mass: Moles: Weight: Al: 4: 26.9815386: O 2: 3: 31.9988: Al 2 O 3: 2: 101.9612772 : Units: molar mass - g/mol, weight - g. Please tell about this free chemistry software to your friends! Feb 12, 2008 . 4Al+3(o2)=2Al2O3. I assume that you know how to compute molar mass. Extended Keyboard; Upload; Examples; Random; Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. Others, in their free state. 0 0 389; Jessica.

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