(a)
Interpretation: The volume of 835 g of
Concept Introduction: The pressure, volume, number of moles, and temperature are related to each other as follows:
Here, P is pressure, V is volume, n is the number of moles, R is the Universal gas constant and T is temperature.
(a)
Explanation of Solution
The mass of
Here, m is mass and M is molar mass.
Molar mass of
Substitute the values,
Now, at STP the value of temperature and pressure is 273.15 K and 1 atm respectively.
The volume is calculated as follows:
Substitute the values,
Thus, a volume of 835 g of
(b)
Interpretation: The mass in grams of a molecule of aspirin needs to be calculated.
Concept Introduction: Mass of a substance can be calculated from the number of moles and molar mass as follows:
Here, n is the number of moles and M is the molar mass.
(b)
Explanation of Solution
According to
Or,
Now, the molar mass of aspirin
Substitute the values,
Thus, the mass of 1 molecule of aspirin is
(c)
Interpretation: The number of atoms in 5.78 mol of
Concept Introduction: According to
(c)
Explanation of Solution
The number of moles of
First, calculate the number of formula units as follows:
Now, the number of atoms can be calculated as follows:
Thus, the number of atoms in 5.78 mol of
Chapter 10 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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