Concept explainers
Consider three 1-gram samples of matter: A, carbon-12; B, carbon-13; C, uranium-238. Rank them in terms of having the greatest number of atoms, from most to least.
The most to least rank number of atoms in 1-gram samples of matter: A, carbon-12; B, carbon-13’ C, uranium-238.
Answer to Problem 1TC
Uranium-238 (
Explanation of Solution
The mole is a measuring quantity that measures the number of atoms that an element contains. One mole contains
From the given sample, the molar mass of carbon-12 is
The moles of matter can be calculated by dividing 1g with their molar mass.
The number of moles of a sample is calculated by dividing the given mass to its the molar mass.
Write the expression for the number of moles.
Substitute the values in the above equation to get the number of moles of Carbon-12.
Substitute the given values of Carbon-13 in the equation (i) to get the number of moles of Carbon-13.
Substitute the values in the above equation to get the number of moles of Uranium-238.
The moles of the matter in given sample is calculated, the matter with more number of moles will have more number of atoms in it. So,
Conclusion:
Therefore, Uranium-238 (
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