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19 August, 14:07

Read the given chemical reaction.

C2H6 + O2 → CO2 + H2O

How many moles of H2O are produced during the complete combustion of 1.4 moles of C2H6?

2.8 moles

4.2 moles

5.6 moles

7.0 moles

+1
Answers (1)
  1. 19 August, 14:13
    0
    the balanced equation for the combustion of ethane is as follows

    2C₂H₆ + 7O₂ - -> 4CO₂ + 6H₂O

    molar ratio of C₂H₆ to H₂O is 2:6

    this means that when 2 mol of C₂H₆ react 6 mol of H₂O are produced

    for every 1 mol of C₂H₆ that reacts thrice the number of moles of H₂O are produced

    therefore when 1.4 mol of C₂H₆ reacts - 3 x 1.4 = 4.2 mol of H₂O are produced

    the answer is 4.2 mol
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