(a)
Interpretation: The representative particle needs to be determined in 3.00 mol Sn.
Concept Introduction: In a substance, a representative particle is the smallest unit of the substance in which it naturally exists. For example, for elements, the representative particle is an atom.
The four types of representative particles are as follows:
- Atom is the smallest particle of an element.
- Ions are atoms with positive or negative charges.
- Molecules are formed when two or more atoms are covalently bonded.
- Formula units are the simplest ratio of ions to form an ionic compound.
(a)
Explanation of Solution
The given substance is 3.0 mol of Sn. The smallest unit of the substance in which it naturally exists is an element. Thus, the representative element is the atom. According to
Therefore, the number of atoms in 3.0 mol of Sn is
(b)
Interpretation: The representative particle needs to be determined in 0.400 mol KCl.
Concept Introduction: In a substance, a representative particle is the smallest unit of the substance in which it naturally exists. For example, for elements, the representative particle is an atom.
The four types of representative particles are as follows:
- Atom is the smallest particle of an element.
- Ions are atoms with positive or negative charges.
- Molecules are formed when two or more atoms are covalently bonded.
- Formula units are the simplest ratio of ions to form an ionic compound.
(b)
Explanation of Solution
The given substance is 0.40 mol of KCl. The smallest unit of the substance in which it naturally exists is the formula unit because it is an ionic compound. Thus, the representative element is the formula unit. According to
Therefore, the number of formula units in 0.40 mol of KCl is
(c)
Interpretation: The representative particle needs to be determined in 7.50 mol of
Concept Introduction: In a substance, a representative particle is the smallest unit of the substance in which it naturally exists. For example, for elements, the representative particle is an atom.
The four types of representative particles are as follows:
- Atom is the smallest particle of an element.
- Ions are atoms with positive or negative charges.
- Molecules are formed when two or more atoms are covalently bonded.
- Formula units are the simplest ratio of ions to form an ionic compound.
(c)
Explanation of Solution
The given substance is 7.50 mol of
Therefore, the number of molecules in 7.50 mol of
(d)
Interpretation: The representative particle needs to be determined in
Concept Introduction: In a substance, a representative particle is the smallest unit of the substance in which it naturally exists. For example, for elements, the representative particle is an atom.
(d)
Explanation of Solution
The given substance is
Therefore, the number of formula units in
Chapter 10 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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