Gaseous ethane CH3CH3 reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. What is the theoretical yield of water formed from the reaction of 0.90g of ethane and 4.2g of oxygen gas?Be sure your answer has the correct number of significant digits in it!!

Question
Asked Dec 7, 2019
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Gaseous ethane 

CH3CH3

 reacts with gaseous oxygen gas 

O2

 to produce gaseous carbon dioxide 

CO2

 and gaseous water 

H2O

. What is the theoretical yield of water formed from the reaction of 

0.90g

 of ethane and 

4.2g

 of oxygen gas?

Be sure your answer has the correct number of significant digits in it!!

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Expert Answer

Step 1

Moles of ethane and Oxygen are calculated for the given reaction as follows,

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+ 702 → 4CO, + 6H,0 2CH;CH3 4.2g х 0.90g Mass 4.2g 0.90g Moles 32g / mol 30.07g / mol = 0.13125moles = 0.030moles

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Step 2

Hence, 2 mole of ethane requires 7 mole of O2, then

           0.030 moles of e...

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mole of O, x(0.030 mole of ethane) (2 mole of ethane) moles of O2 =0.105 moleof 0, required. Limiting reagent is Ethane.

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