contestada

The chemical equation below shows the combustion of methane (ch4). Ch4 + 2o2 right arrow. Co2 + 2h2o the molar mass of oxygen gas (o2) is 32. 00 g/mol. The molar mass of carbon dioxide (co2) is 44. 01 g/mol. What mass of co2, in grams, will form when 8. 94 g o2 completely react?.

Respuesta :

CintiaSalazar

Taking into account the reaction stoichiometry, 6.15 grams of COâ‚‚ are formed when 8.94 grams of Oâ‚‚ reacts completely.

In first place, the balanced reaction is:

CH₄ + 2 O₂  → CO₂ + 2 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

  • CHâ‚„: 1 mole
  • Oâ‚‚: 2 moles
  • COâ‚‚: 1 mole
  • Hâ‚‚O: 2 moles

The molar mass of the compounds is:  

  • CHâ‚„: 16.04 g/mole
  • Oâ‚‚: 32 g/mole
  • COâ‚‚: 44.01 g/mole
  • Hâ‚‚O: 18 g/mole

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

  • CHâ‚„: 1 mole× 16.04 g/mole= 16.04 grams
  • Oâ‚‚: 2 moles× 32 g/mole= 64 grams
  • COâ‚‚: 1 mole× 44.01 g/mole= 44.01 grams
  • Hâ‚‚O: 2 moles× 18 g/mole= 36 grams

Then the following rule of three can be applied: if by reaction stoichiometry 64 grams of Oâ‚‚ form 44.01 grams of COâ‚‚, 8.94 grams of Oâ‚‚ form how much mass of COâ‚‚?

[tex]mass of CO_{2} =\frac{8.94 grams of O_{2} x44.01 grams of CO_{2} }{64 grams of O_{2}}[/tex]

mass of COâ‚‚= 6.15 grams

Finally, 6.15 grams of COâ‚‚ are formed when 8.94 grams of Oâ‚‚ reacts completely.

Learn more about reaction stoichiometry:  

  • brainly.com/question/24741074
  • brainly.com/question/24653699
  • brainly.com/question/23871710

Otras preguntas