Chemistry, 19.07.2020 14:01 robertobi1988

3. The density of acetic anhydride is 1.08 g/mL. How many moles of acetic anhydride are used in this experiment

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Answer from: emilydis2594

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:

$\rm Density=\dfrac{Mass}{Volume}$

The moles have been the mass of the substance with respect to the molar mass. The moles of a substance has been given as:

$\rm Moles=\dfrac{Mass}{Molar\;mass}$

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:

$\rm 1.08=\dfrac{Mass}{10}\\
 Mass=1.08\;\times\;10\;g\\
Mass=10.8\;g$

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:

$\rm Moles=\dfrac{10.8}{102.09} \\
Moles=0.1058\;mol$

The moles of acetic acid used in the experiment has been 0.1058 mol.

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Answer from: hippocampus

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

Answer from: Quest

Ithink the answer is c i hope it my friend message me if i’m wrong and i’ll change my answer and fix it for you

Answer from: Quest

the balanced equation for reaction of ca metal with o2 to produce cao is as below

2 ca+ o2→ 2 cao2

explanation

the reaction is balanced since the number of atoms in reactant side is equal to number of atoms in product side. for example they are 2 atom of ca in reactant side and 2 atoms of ca in the product side.

the process is a meet the requirement of redox reaction because : calcium is oxidized from oxidation state 0 to 2+ while oxygen is reduced from oxidation state 0 to 2-

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3. The density of acetic anhydride is 1.08 g/mL. How many moles of acetic anhydride are used in this...

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