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Natural uranium ore contains about 0.720$\%$ of the fissile uranium $-235$ isotope. Suppose a sample of uranium ore contains $2.50 \times 10^{28}$ uranium nuclei. Determine the number of uranium-235 nuclei in the sample.

$n=1.80 \times 10^{26}$

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So, given the total number of uranium new kleiss ISS 2.5 times sent power off to eat. And we want to find a number off your name to treat five. I sort of inside this amount off your place and were given to you percentage off you never 235 is 0.72% after the total number of you guys. So I have to do is to take 0.72% off the entire operation off your interview cuts that is in over here every shoot get 1.8 Don't send politics six.

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