Question

The mass of O2 required to burn 0.1 mole of C2H5OH is:
(a) 32g (b) 3.2g (C) 5.6g
(d) 9.6g​

Answer 1

Answer:

d is correct answer hope so

Answer 2

9.6 grams of Oxygen gas is required to burn 0.1 moles of C₂H₅OH

GIVEN

Moles of C₂H₅OH = 0.1 moles

TO FIND

Mass of O₂ required to burn 0.1 moles of C₂H₅OH

SOLUTION

We can simply solve the above problem as follows-

Combustion of ethane is given as -

C₂H₅OH + 3O₂ --------> 2CO₂ + 3H₂O

We can observe that,

To burn 1 mole of Ethane, 3 moles of oxygen are required.

So, To burn 0.1 moles of ethane amount of oxygen required = 3 × 0.1 = 0.3 moles

We know that,

Moles = Given mass/Molecular mass

Given mass = 0.3 × 32 = 9.6 grams

Hence, 9.6 grams of Oxygen gas is required to burn 0.1 moles of C₂H₅OH

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