contestada

If 18.0 g of CO2 is produced in the reaction of C2H2 with O2 to form CO2 and
H2O, how many grams of H20 are produced in this reaction?
O 3.68 g
9.0 g
14.7 g
None of the above
7.37 g

Respuesta :

lilethnguyen

Answer:

3.68 g

Explanation:

[tex]n_{CO2}[/tex] = 18 ÷ 44 = 0.4

2C2H2 + 5O2 → 4CO2 + 2H2O

   2       :    5      :    4      :    2  

                             0.409                 (moles)

⇒ [tex]n_{H2O}[/tex] = 0.409 × 2 ÷ 4 = 0.2045 moles

⇒ [tex]m_{H2O}[/tex] = 0.2045 × 18 = 3.68 grams

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