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Which of the following 49.5 g samples contain the fewest number of atoms? question 2 options: sodium iron platinum carbon lead
Accepted Answer
The sample with the fewest atoms will be the one with the highest molar mass. Here's why:
Molar mass: The mass of one mole of a substance (6.022 x 10^23 atoms). The higher the molar mass, the more mass is contained in each mole, and therefore fewer moles are present in a fixed mass (like 49.5 g).
Out of the given options, platinum (Pt) has the highest molar mass. Therefore, a 49.5 g sample of platinum would contain the fewest atoms.
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