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electrofy456
11.04.2020 •
Chemistry
Objects 1 and 2 float as shown in the beaker below. The density of the liquid in the beaker is 3.2 g/cm3. Which of the densities given below are possible values for the densities of the two objects?
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Ответ:
The percent yield of the reaction is 32.34 %
Explanation:
To calculate the number of moles, we use the equation:
.....(1)
For benzoic acid:Given mass of benzoic acid = 3.6 g
Molar mass of benzoic acid = 122.12 g/mol
Putting values in equation 1, we get:
The chemical equation for the reaction of benzoic acid and methanol is:
By Stoichiometry of the reaction
1 mole of benzoic acid produces 1 mole of methyl benzoate
So, 0.0295 moles of benzoic acid will produce =
moles of methyl benzoate
Now, calculating the mass of methyl benzoate from equation 1, we get:Molar mass of methyl benzoate = 136.15 g/mol
Moles of methyl benzoate = 0.0295 moles
Putting values in equation 1, we get:
![0.0295mol=\frac{\text{Mass of methyl benzoate}}{136.15g/mol}\\\\\text{Mass of methyl benzoate}=(0.0295mol\times 136.15g/mol)=4.02g](/tpl/images/0544/9562/6e664.png)
To calculate the percentage yield of methyl benzoate, we use the equation:Experimental yield of methyl benzoate = 1.3 g
Theoretical yield of methyl benzoate = 4.02 g
Putting values in above equation, we get:
Hence, the percent yield of the reaction is 32.34 %