Respuesta :
The minimum mass of oxygen required for the complete chemical reaction of 20.0 mL of hexane is 46.6 grams.
What is a chemical reaction?
An act that changes one group of chemical constituents chemically into another is known as a chemical reaction. Chemical reactions typically involve changes that only influence the positions of electrons in the formation and dissolution of chemical bonds between atoms, with no change to the nuclei. Chemical processes are commonly described by a chemical equation. Nuclear chemistry is the study of chemical reactions involving unstable and radioactive elements, where both electronic and nuclear changes may occur.
The substance(s) that are first used in a chemical reaction are known as reactants or reagents. Chemical equations, which represent the initial substances, final products, and occasionally intermediate products as well as the reaction circumstances symbolically, are used to describe chemical reactions.
Explanation:
[tex]2C_{6} H_{14} + 19O_{2}[/tex] [tex]----- >[/tex] [tex]12CO_{2} +14H_{2} O[/tex]
Given: Hexane's density is 0.660 g/ml
volume of hexane = 20 ml
Mass of hexane =
density of hexane x volume of hexane=0.6660g/ml x 20ml=13.2g
moles of hexane =[tex]\frac{given mass}{x} . molar mass[/tex] = [tex]\frac{13.2g}{86.18g/mol}[/tex] = 0.15moles
According to stoichiometry :
2 moles of hexane reacts with 19 moles of oxygen
Thus 0.14 moles hexane will react with = moles of oxygen
Mass of oxygen =[tex]moles x molar mass= 1.45 x 32 =46.6g[/tex]
Thus minimum mass of oxygen required for the complete reaction of 20.0 mL of hexane is 46.6 grams.
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