Finding Mass through Stoichiometry of Ethanol in a chemical equation

AI Thread Summary
The discussion focuses on calculating the mass of ethanol produced from a fermentation reaction involving glucose. Key points include the need to determine the mass of 100% ethanol, the expected yield from an 18% glucose solution, and the generation of byproducts like carbon dioxide. The molecular weight and density of ethanol are provided, but the original poster expresses confusion about how to start the calculations with the given information. The conversation highlights the necessity for additional variables to accurately solve the problem. Understanding stoichiometry and the relationship between glucose and ethanol is essential for finding the required mass.
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Homework Statement



1) What is the mass of 100% Ethanol?
2) How much ethanol would be expected from 18% glucose solution?
3) What else will be generated? How can we calculate this amount?

Given:

Fermentation Equation:

C6H12O6(aq) + 2C2H5OH(aq) + 2CO2(g) + Heat
(glucose) (ethanol) (carbon dioxide) Molecular Weight of Ethanol = 46.7 g/mol
Density of Ethanol = 0.789 g/cm3
2% glucose solution contains 20g/L of glucose

Homework Equations


D=M/V

The Attempt at a Solution


To be honest I'm not sure where to start to attempt this question. A friend of mine sent me this question last night for her assignment and I was stumped. I just wanted to know if someone could help explain how I could find the mass of ethanol with only the variables given to me. I've asked my friend and she keeps insisting there were no other variables. I haven't touched chemistry in years and was just wondering if someone could refresh my memory.
 
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how do you find an extensive variable from an intensive variable?

lol tell him he is missing some info
 

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