The correct answer is 14.8%.
The given reaction,
C_6H_12O_6 ----> 2CO₂ + 2C₂H₂OH
A key idea in chemistry is stoichiometry, which determines the quantity of reactants or products in a chemical reaction and aids in understanding different reactions and the proportions in which they might take place. A combination of two Greek terms is stoichiometry. Stoicheion, which denotes an element, and metron, which denotes a unit of measurement
mole= mass/mole mass
=90g/180g/mol
=0.5mol
According to stoichiometry
1 mol glucose = 2 mol ethanol
0.5 mol C_6H_12O_6 = 1 mole ethanol
mass of ethanol = 1 mole ×46 g/ mol
Theoretical yield = 46 g
percentage = actual yield / theoretical yield × 100
=6.8 g / 46 g × 100 = 14.78% =14.8%
To learn more about percentage yield refer the link:
https://brainly.com/question/15443303
#SPJ9
