Answer
$10/2\times10^{-26}=5\times10^{26}$ atoms
Work Step by Step
The mass of a cat is around 10kg. Answers will vary based on the estimated size you use.
$10u=2\times10^{-26}kg.$
convert it by $10kg/2\times10^{-26}kg=5\times10^{26}$ atoms.
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