Multiple Choice
Which statement best describes a mole in chemistry?
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views
2. Atoms & Elements
Mole Concept
Multiple Choice
Which sample contains exactly 1 mole of atoms?
A
g of
B
g of
C
g of
D
g of
Verified step by step guidance1
Identify the molar mass of each substance given in the problem. For example, find the molar mass of O\_2, H, NaCl, and C by summing the atomic masses of their constituent atoms.
Calculate the number of moles of each substance by dividing the given mass by its molar mass using the formula: \(\text{moles} = \frac{\text{mass}}{\text{molar mass}}\).
Determine the number of atoms in each sample. For elemental substances like H and C, the number of moles of atoms is the same as the number of moles of the substance. For molecular substances like O\_2 and NaCl, consider the number of atoms per molecule: O\_2 has 2 atoms per molecule, NaCl has 2 atoms per formula unit (Na and Cl). Multiply the moles of the substance by the number of atoms per molecule to get moles of atoms.
Compare the moles of atoms calculated for each sample to find which one contains exactly 1 mole of atoms.
Confirm that the sample with 1 mole of atoms corresponds to the given mass, verifying the correct answer.
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