Co-60 has a half life of 10.48 minutes. How long will it take for the isotope to decay to 1/64th of its original quantity?
1 answer:
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Answer:
(a)
(b)
(c)
(d)
(e)
Explanation:
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(a) For the lucite, one computes the moles of C, H and O that are present:
Now, dividing each moles by the smallest moles (oxygen's moles), one obtains:
Finally, we look for the smallest whole number subscript by multiplying by 2, so the empirical formula turns out into:
(b) For the Saran, one computes the moles of C, H and Cl that are present:
Now, dividing each moles by the smallest moles (hydrogen's moles), one obtains:
Finally, as all of the subscripts are whole numbers, the empirical formula turns out into:
(c) For the polyethylene, one computes the moles of C and H that are present:
Now, dividing each moles by the smallest moles (carbon's moles), one obtains:
Finally, as all of the subscripts are whole numbers, the empirical formula turns out into:
(d) For the polystyrene, one computes the moles of C and H that are present:
Now, dividing each moles by the smallest moles (either carbon's or hydrogen's moles), one obtains:
Finally, as all of the subscripts are whole numbers, the empirical formula turns out into:
(e) For the orlon, one computes the moles of C, H and N that are present:
Now, dividing each moles by the smallest moles (nitrogen's moles), one obtains:
Finally, as all of the subscripts are whole numbers, the empirical formula turns out into:
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