Anne completely fills the fuel tank of her car with a mixture of gasoline and ethanol, C2H5OH. When filled, the fuel tank contai

Question

3 years ago

8

ns 2350 g of C2H5OH. How many moles of C2H5OH are in the fuel tank?

1 answer:

solniwko [45] · Answer 1 · 2022-04-24T17:05:52+03:00

There are 51.09 moles of C₂H₅OH in the fuel tank

<h3>Further explanation </h3>

A mole is a number of particles(atoms, molecules, ions) in a substance

This refers to the atomic total of the 12 gr C-12 which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

moles can also be obtained by dividing the mass (in grams) with the molar mass

m = mass

M = relative molecular mass / molar mass

$\tt n=\dfrac{mass}{MW}$

The fuel tank contains 2350 g of C₂H₅OH, so mol C₂H₅OH(MW= 46 g/mol) :

$\tt moles~C_2H_5OH=\dfrac{2350}{46}\\\\moles~C_H_5OH=51.09$