Respuesta :
Answer:
Number of moles = 0.1058 mol
Explanation:
Density = 1.08 g/mL
Volume = 10ml
Density = Mass / Volume
Mass = Density * Volume
Mass = 1.08 * 10 = 10.8g
The molar mass of acetic anhydride = 102.09 g/mol
Molar mass = Mass / Moles
Upon solving for moles;
Moles = Mass / Molar mass
Moles = 10.8 / 102.09 = 0.1058 mol
The moles of acetic acid used in the experiment has been 0.1058 mol.
Density has been defined as mass of a substance per unit volume. The density has been expressed as:
[tex]\rm Density=\dfrac{Mass}{Volume} [/tex]
The moles have been the mass of the substance with respect to the molar mass. The moles of a substance has been given as:
[tex]\rm Moles=\dfrac{Mass}{Molar\;mass} [/tex]
Computation for the Moles of Acetic Acid
The given sample of acetic acid has density = 1.08 g/ml
The volume of the sample used in the experiment has been 10 ml.
Substituting the values for the mass of acetic acid:
[tex]\rm 1.08=\dfrac{Mass}{10}\\ Mass=1.08\;\times\;10\;g\\ Mass=10.8\;g[/tex]
The mass of the acetic acid used has been 10.8 g.
The molar mass of acetic acid has been 102.09 g/mol.
Substituting the values for the moles of acetic acid:
[tex]\rm Moles=\dfrac{10.8}{102.09} \\ Moles=0.1058\;mol[/tex]
The moles of acetic acid used in the experiment has been 0.1058 mol.
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