Respuesta :

ardni313

The concentration of ethanol in this solution : 2.14 M

Further explanation

Molarity is a way to express the density of the solution

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

[tex]\tt \large{\boxed{\bold {M ~ = ~ \dfrac {n} {V}}}[/tex]

Where

M = Molarity

n = Number of moles of solute

V = Volume of solution

Ethanol(C₂H₅OH) MW =46,06844 g/mol[

  • mass of solute (Ethanol)

[tex]\tt 50\times 0.79=39.5~g[/tex]

  • mol of Ethanol

[tex]\tt \dfrac{39.5}{46.06844}=0.8574[/tex]

  • molarity

[tex]\tt \dfrac{0.8574}{0.4}=2.14~M[/tex]

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