Concept explainers
Interpretation:
Whether a mole of potassium or a mole of sodium has more mass should be determined with explanation.
Concept introduction:
Number of moles of a compound is defined as the ratio of given mass of the compound to the molar or molecular mass of the compound.
The mathematical expression is given by:
Number of moles =
The one mole of any substance is equal to the
Answer to Problem 104A
Mass of one mole of potassium is greater than the mass of one mole of sodium.
Explanation of Solution
The mathematical expression is given by:
Number of moles =
Number of moles of potassium = 1 mole
Number of moles of sodium = 1 mole
Molar mass of potassium = 39.1 g/mole
Molar mass of sodium = 23 g/mole
Number of moles of potassium =
Put the values,
1 mole =
Mass of potassium =
Number of moles of sodium =
Put the values,
1 mole =
Mass of sodium =
Thus, mass of one mole of potassium is greater than the mass of one mole of sodium.
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Glencoe Chemistry: Matter and Change, Student Edition
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