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Acetylene gas (C2H2) is used in welding torches. When it reacts with oxygen, it produces
carbon dioxide (CO2) and steam (H20). The reaction can be described by the equation 2C2H2+
502 —> 4CO2 + 2H20. How much mass of C2H2 is needed to produce 75.0 grams of CO2?

Respuesta :

ardni313

Mass C₂H₂ needed : 22.165 g

Further explanation

Reaction

2C₂H₂+ 5O₂ ⇒ 4CO₂ + 2H₂O

75.0 grams of CO₂ , mol CO₂ (MW=44 g/mol) :

[tex]\tt \dfrac{75}{44}=1.705[/tex]

mol C₂H₂ :

[tex]\tt \dfrac{2}{4}\times 1.705=0.8525[/tex]

mass C₂H₂ (MW=26 g/mol) :

[tex]\tt 0.8525\times 26=22.165~g[/tex]

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