The sulfuric acid–catalyzed reaction of isopentyl alcohol with acetic acid to form isopentyl acetate is performed. This reaction
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To calculate the packing factor, first calculate the area and volume of unit cell.
Area is calculated as:
Here, R is radius and is related to a as follows:
Putting the value in expression for area,
The value of a is 0.4961 nm
Since,
Thus,
Putting the value,
Now, volume can be calculated as follows:
The value of c is 1.360 nm or
Putting the value,
now, number of atom in unit cell can be calculated by using the following formula:
Here, A is atomic mass of is 151.99 g/mol.
Putting all the values,
Thus, there will be 18 units in 1 unit cell.
Since, there are 2 Cr atoms and 3 oxygen atoms thus, units of chromium and oxygen will be 2×18=36 and 3×18=54 respectively.
The atomic radii of and
is 62 pm and 140 pm respectively.
Converting them into cm:
Thus,
and,
Volume of sphere will be sum of volume of total number of cations and anions thus,
Since, volume of sphere is ,
Putting the values,
The atomic packing factor is ratio of volume of sphere and volume of crystal, thus,
Thus, atomic packing factor is 0.758.
Answer:
Explanation:
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In this case, given that the mass of the product is 0.534 g, we can infer that the percent composition of tin is:
Therefore, the percent composition of oxygen is 6.4% for a 100% in total. Thus, with such percents we compute the moles of each element in the oxide:
In such a way, for finding the smallest whole number we divide the moles of both tin and oxygen by the moles of oxygen as the smallest moles:
Therefore, the empirical formula is:
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Mass of potassium hydrogen pthalate KHP is 0.4856 g, its molar mass is 204.22 g/mol, number of moles of KHP can be calculated as follows:
Here, m is mass and M is molar mass, putting the values,
This will be number of moles of NaOH at equivalent point.
Detailed calculations:
Molarity is defined as number of moles in 1 L of solution, for 250 mL of solution, molarity will be:
For 25 mL, apply dilution law as follows:
Putting the values,
On rearranging,
Convert molarity into number of moles,
At equivalent point, number of moles of KHP will be equal to NaOH, thus, number of moles of NaOH will be 0.00237 mol.
Calculation for molarity:
Volume of NaOH is 18.75 mL, thus, molarity can be calculated as follows:
Putting the values,
Therefore, molarity of NaOH is 0.1264 M