(a)
Interpretation : The number of moles of NaF in the tube of toothpaste should be calculated.
Concept Introduction : The molar mass of any compound is always the sum of
Mass percent composition can be given as:
(b)
Interpretation: The number of fluoride ions in the tube of toothpaste should be calculated.
Concept Introduction : The molar mass of any compound is always the sum of atomic masses of atoms present in the compound. The relation between moles and mass can be expressed as:
Mass percent composition can be given as:
(c)
Interpretation : The mass of sodium ion should be calculated.
Concept Introduction : The molar mass of any compound is always the sum of atomic masses of atoms present in the compound. The relation between moles and mass can be expressed as:
Mass percent composition can be given as:
(d)
Interpretation : The number of molecules of triclosan should be calculated.
Concept Introduction : The molar mass of any compound is always the sum of atomic masses of atoms present in the compound. The relation between moles and mass can be expressed as:
Mass percent composition can be given as:
(e)
Interpretation : The mass percent composition of triclosan should be calculated.
Concept Introduction : The molar mass of any compound is always the sum of atomic masses of atoms present in the compound. The relation between moles and mass can be expressed as:
Mass percent composition can be given as:
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Basic Chemistry
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